Econometrics or machine learning. I explain which each tool is appropriate, and survey the issues and tools involved in establishing causal relationships.
Statistics in the age of data science, issues you can not ignoreTuri, Inc.
This document discusses issues in statistics that data scientists can and cannot ignore when working with large datasets. It begins by outlining the talk and defining key terms in data science. It then explains that model assessment, such as estimating model performance on new data, becomes easier with more data as statistical adjustments are not needed. However, more data and variables are not always better, as noise, collinearity, and overfitting can still occur. Several examples are given where common machine learning algorithms can be fooled into achieving high accuracy on training data even when the target variable is random. The conclusion emphasizes that data science, statistics, and domain expertise each provide unique perspectives, and effective teams need to understand all views.
This document provides an overview of conducting a science experiment using the scientific method. It compares the problem solving process to the scientific method, noting they both involve asking a question, doing research, analyzing possible solutions, testing hypotheses, analyzing data to draw conclusions, and implementing the best solution. It also provides tips for high school science experiments, such as using double boards to display more information and including a log book. Finally, it discusses how technology like unit conversion and spreadsheet applications can help enhance the accuracy of experimental data.
Clinical prediction models:development, validation and beyondMaarten van Smeden
This document appears to be a slide deck on the topic of clinical prediction models. It discusses:
- The differences between explanatory, predictive, and descriptive models.
- Challenges with predictive models like overfitting and the need for shrinkage methods.
- Sample size criteria like events per variable (EPV) and challenges validating models with low EPV.
- Methods for validating predictive performance like apparent, internal, and external validation and quantifying optimism.
- Additional validation strategies like bootstrapping and the importance of assessing calibration.
From Raw Data to Deployed Product. Fast & Agile with CRISP-DMMichał Łopuszyński
The document summarizes the Cross Industry Standard Process for Data Mining (CRISP-DM), which is the most popular methodology for data-centric projects. It walks through each step of the CRISP-DM process, including business understanding, data understanding, data preparation, modelling, evaluation, and deployment. For each step, it provides examples and highlights important dos and don'ts, such as thoroughly understanding the problem and data quality before modelling, automating repetitive data preparation tasks, and guarding against overfitting and data leakage during evaluation. The overall document serves as a guide to successfully applying the CRISP-DM process from raw data to deployed product.
Dichotomania and other challenges for the collaborating biostatisticianLaure Wynants
Conference presentation at ISCB 41 in the session
"Biostatistical inference in practice: moving beyond false
dichotomies"
A comment in Nature, signed by over 800 researchers, called for the scientific community to “retire statistical significance”. The responses included a call to halt the use of the term „statistically significant”, and changes in journal’s author guidelines. The leading discourse among statisticians is that inadequate statistical training of clinical researchers and publishing practices are to blame for the misuse of statistical testing. In this presentation, we search our collective conscience by reviewing ethical guidelines for statisticians in light of the p-value crisis, examine what this implies for us when conducting analyses in collaborative work and teaching, and whether the ATOM (accept uncertainty; be thoughtful, open and modest) principles can guide us.
Make clinical prediction models great againBenVanCalster
This document discusses developing and validating clinical prediction models. It notes that when developing models, the objective and available predictors must be clearly defined. Overfitting should be avoided by not ignoring information or using flexible algorithms without sufficient data. When validating models, calibration is essential to assess and heterogeneity between locations and over time is expected, so single validation studies provide limited information. Machine learning is popular but concerns include poor study design and lack of clarity around methodology, as flexible algorithms require large, high-quality datasets to achieve benefits over traditional statistics.
Econometrics or machine learning. I explain which each tool is appropriate, and survey the issues and tools involved in establishing causal relationships.
Statistics in the age of data science, issues you can not ignoreTuri, Inc.
This document discusses issues in statistics that data scientists can and cannot ignore when working with large datasets. It begins by outlining the talk and defining key terms in data science. It then explains that model assessment, such as estimating model performance on new data, becomes easier with more data as statistical adjustments are not needed. However, more data and variables are not always better, as noise, collinearity, and overfitting can still occur. Several examples are given where common machine learning algorithms can be fooled into achieving high accuracy on training data even when the target variable is random. The conclusion emphasizes that data science, statistics, and domain expertise each provide unique perspectives, and effective teams need to understand all views.
This document provides an overview of conducting a science experiment using the scientific method. It compares the problem solving process to the scientific method, noting they both involve asking a question, doing research, analyzing possible solutions, testing hypotheses, analyzing data to draw conclusions, and implementing the best solution. It also provides tips for high school science experiments, such as using double boards to display more information and including a log book. Finally, it discusses how technology like unit conversion and spreadsheet applications can help enhance the accuracy of experimental data.
Clinical prediction models:development, validation and beyondMaarten van Smeden
This document appears to be a slide deck on the topic of clinical prediction models. It discusses:
- The differences between explanatory, predictive, and descriptive models.
- Challenges with predictive models like overfitting and the need for shrinkage methods.
- Sample size criteria like events per variable (EPV) and challenges validating models with low EPV.
- Methods for validating predictive performance like apparent, internal, and external validation and quantifying optimism.
- Additional validation strategies like bootstrapping and the importance of assessing calibration.
From Raw Data to Deployed Product. Fast & Agile with CRISP-DMMichał Łopuszyński
The document summarizes the Cross Industry Standard Process for Data Mining (CRISP-DM), which is the most popular methodology for data-centric projects. It walks through each step of the CRISP-DM process, including business understanding, data understanding, data preparation, modelling, evaluation, and deployment. For each step, it provides examples and highlights important dos and don'ts, such as thoroughly understanding the problem and data quality before modelling, automating repetitive data preparation tasks, and guarding against overfitting and data leakage during evaluation. The overall document serves as a guide to successfully applying the CRISP-DM process from raw data to deployed product.
Dichotomania and other challenges for the collaborating biostatisticianLaure Wynants
Conference presentation at ISCB 41 in the session
"Biostatistical inference in practice: moving beyond false
dichotomies"
A comment in Nature, signed by over 800 researchers, called for the scientific community to “retire statistical significance”. The responses included a call to halt the use of the term „statistically significant”, and changes in journal’s author guidelines. The leading discourse among statisticians is that inadequate statistical training of clinical researchers and publishing practices are to blame for the misuse of statistical testing. In this presentation, we search our collective conscience by reviewing ethical guidelines for statisticians in light of the p-value crisis, examine what this implies for us when conducting analyses in collaborative work and teaching, and whether the ATOM (accept uncertainty; be thoughtful, open and modest) principles can guide us.
Make clinical prediction models great againBenVanCalster
This document discusses developing and validating clinical prediction models. It notes that when developing models, the objective and available predictors must be clearly defined. Overfitting should be avoided by not ignoring information or using flexible algorithms without sufficient data. When validating models, calibration is essential to assess and heterogeneity between locations and over time is expected, so single validation studies provide limited information. Machine learning is popular but concerns include poor study design and lack of clarity around methodology, as flexible algorithms require large, high-quality datasets to achieve benefits over traditional statistics.
Why the EPV≥10 sample size rule is rubbish and what to use instead Maarten van Smeden
This document discusses issues with the commonly used EPV≥10 sample size rule for prognostic/diagnostic prediction modeling. It argues that the rule has no strong rationale and that sample size is still important even when using more sophisticated methods. It presents evidence that logistic regression coefficients are subject to finite sample bias and introduces Firth's correction as a method to reduce this bias. While this method improves matters, the document cautions that sample size planning still requires consideration of multiple factors specific to the model and validation rather than relying on a single rule-of-thumb.
Development and evaluation of prediction models: pitfalls and solutionsMaarten van Smeden
Slides for the statistics in practice session for the Biometrisches Kolloqium (organized by the Deutsche Region der Internationalen Biometrischen Gesellschaft), 18 March 2021
This document summarizes Michał Łopuszyński's presentation on using an agile approach based on the CRISP-DM methodology for data mining projects. It discusses the key phases of CRISP-DM including business understanding, data understanding, data preparation, modelling, evaluation, and deployment. For each phase, it provides examples of best practices and challenges, with an emphasis on spending sufficient time on data understanding and preparation, developing models with the deployment context in mind, and carefully evaluating results against business objectives.
2013 is the International Year of Statistics, a worldwide event supported by nearly 1,850 organizations.
Celebrate it with us!
Check the most important statistics books.
Prediction, Big Data, and AI: Steyerberg, Basel Nov 1, 2019Ewout Steyerberg
Title"Clinical prediction models in the age of artificial intelligence and big data", presented at the Basel Biometrics Society seminar Nov 1, 2019, Basel, by Ewout Steyerberg, with substantial inout from Maarten van Smeden and Ben van Calster
This document summarizes the research topics and projects of the Data Analytics Group (DAG) at the University of South Australia. It discusses DAG's focus on relationship discovery, data integration and quality, text mining, outlier detection, causal modeling and reasoning, and sensor data management for water utilities. Key points include DAG having 5 academics, 4 postdocs and 15 students, $1.5M in funding, and projects with industry partners on topics like causal inference, identity resolution, medication safety surveillance, and water treatment performance assessment.
Filling the gaps in translational researchPaul Agapow
- Translational research often focuses on early-stage problems that are interesting scientifically but do not address the most important problems in developing new therapies. This neglects later and more difficult stages of drug development where the largest costs and failures occur.
- More focus is needed on developing therapies for complex, systemic diseases and diverse patient populations using real-world data and approaches that incorporate biological complexity early in the process. Machine learning should be applied where it can have the most impact in reducing costs, such as predicting adverse events later in development.
- Efforts are also needed to build more diverse, representative datasets and use data science approaches like drug repurposing that have the potential to accelerate therapy development.
In this Slides, show the some basic terminology, history, application of statistics and definition of statistics. How many Types of statistics? The Terminology is given below:
-Probability
-Scope
-Sample
-Population
-Statistical Inference
Introduction to prediction modelling - Berlin 2018 - Part IIMaarten van Smeden
This document summarizes the key steps in building a risk prediction model:
1. Conduct research design and data collection, typically using a prospective cohort study.
2. Choose statistical model, outcome, and candidate predictors based on clinical knowledge.
3. Perform initial data analysis including descriptive statistics and assessing predictors.
4. Specify and estimate the prediction model, addressing issues like handling continuous predictors and missing data.
5. Evaluate the model's performance using measures like discrimination and calibration and perform internal validation to account for overoptimism.
6. Present the final model following reporting guidelines like TRIPOD.
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Stout Healthcare Analytics Midwestern UniversityDr. Chris Stout
This document discusses the use of big data, predictive analytics, and machine learning in healthcare. It contains the following key points:
1. Predictive analytics and machine learning are increasingly being used in clinical trials to test health apps and their ability to improve outcomes. If apps are shown to reduce costs by decreasing ER visits or improving medication adherence, they could help cut healthcare costs.
2. Many hospitals are testing health and fitness apps from companies like Apple, Google, Phillips, and Samsung that integrate diverse data to create a more comprehensive health picture for providers.
3. The speaker's company has used predictive analytics on over 15,000 prior medical bills to identify treatment guidelines, automate approvals, and reduce costs
Genetic algorithms and feature selection techniques are used to analyze medical diagnosis data and predict disease. The process involves obtaining patient data, selecting relevant features, and using a genetic algorithm to evolve a mathematical model for accurate prediction. Specifically, (1) medical records are collected as training data, (2) irrelevant variables are removed via filter feature selection, and (3) a genetic algorithm simulates natural selection to iteratively improve a model for predicting disease in new patient records. This automated approach helps analyze large datasets, minimize human interaction, and facilitate timely treatment recommendations.
mat 300,strayer mat 300,mat 300 entire course new,mat 300 discussion questions,strayer mat 300 week 1,strayer mat 300 week 2,strayer mat 300 week 3,strayer mat 300 week 4,strayer mat 300 week 5,mat 300 case study,mat 300 discussion correlation and regression,mat 300 graphical representations,strayer mat 300 tutorials,strayer mat 300 assignments,mat 300 help
This document outlines the objectives and requirements for a research project being conducted by the UOEC club. Small teams will choose a topic to research, gather quantitative data, use STATA to run regressions, and answer a provided question on how independent variables affect the dependent variable. Teams are then free to further analyze the data. Each team must have an executive member experienced with econometrics. Teams will present their findings to the club. The document provides a list of objectives for participants and resources for gathering data.
Avito recsys-challenge-2016RecSys Challenge 2016: Job Recommendation Based on...Vasily Leksin
This slides describes our solution for the RecSys Challenge 2016. In the challenge, several datasets were provided from a social network for business XING. The goal of the competition was to use these data to predict job postings that a user will interact positively with (click, bookmark or reply). Our solution to this problem includes three different types of models: Factorization Machine, item-based collaborative filtering, and content-based topic model on tags. Thus, we combined collaborative and content-based approaches in our solution.
Our best submission, which was a blend of ten models, achieved 7th place in the challenge's final leaderboard with a score of 1677898.52. The approaches presented in this paper are general and scalable. Therefore they can be applied to another problem of this type.
The science of statistics deals with the collection, analysis, interpretation, and presentation of data. We see and use data in our everyday lives. The measure of whether the results of research were due to chance. The more statistical significance assigned to an observation, the less likely the observation occurred by chance.
Learn how to transform from a mild-mannered online organizer into a true data-driven mastermind! What to track, how to test, and methods for creating a data-driven culture at your nonprofit.
Cross border - off-shoring and outsourcing privacy sensitive dataUlf Mattsson
Ulf Mattsson is the CTO of Protegrity, with over 20 years of experience in research and development and global services at IBM. He has been involved in developing encryption, tokenization, and intrusion prevention technologies. The document discusses cross-border offshoring and outsourcing of privacy sensitive data in the cloud. It notes that cloud services are often provided by third parties and can involve data being stored in multiple locations. Regulations like PCI DSS and national privacy laws apply when data crosses borders or is outsourced. Sensitive data needs to be protected to comply with regulations and address threats while also enabling useful insights from the data. Methods like de-identification through tokenization and encryption can protect identifiable data
Best data science training Institute: Kellytechnologies is the best data science training Institutes in Hyderabad.Providing greate data science training by realtime faculty in hyderabad.
Why the EPV≥10 sample size rule is rubbish and what to use instead Maarten van Smeden
This document discusses issues with the commonly used EPV≥10 sample size rule for prognostic/diagnostic prediction modeling. It argues that the rule has no strong rationale and that sample size is still important even when using more sophisticated methods. It presents evidence that logistic regression coefficients are subject to finite sample bias and introduces Firth's correction as a method to reduce this bias. While this method improves matters, the document cautions that sample size planning still requires consideration of multiple factors specific to the model and validation rather than relying on a single rule-of-thumb.
Development and evaluation of prediction models: pitfalls and solutionsMaarten van Smeden
Slides for the statistics in practice session for the Biometrisches Kolloqium (organized by the Deutsche Region der Internationalen Biometrischen Gesellschaft), 18 March 2021
This document summarizes Michał Łopuszyński's presentation on using an agile approach based on the CRISP-DM methodology for data mining projects. It discusses the key phases of CRISP-DM including business understanding, data understanding, data preparation, modelling, evaluation, and deployment. For each phase, it provides examples of best practices and challenges, with an emphasis on spending sufficient time on data understanding and preparation, developing models with the deployment context in mind, and carefully evaluating results against business objectives.
2013 is the International Year of Statistics, a worldwide event supported by nearly 1,850 organizations.
Celebrate it with us!
Check the most important statistics books.
Prediction, Big Data, and AI: Steyerberg, Basel Nov 1, 2019Ewout Steyerberg
Title"Clinical prediction models in the age of artificial intelligence and big data", presented at the Basel Biometrics Society seminar Nov 1, 2019, Basel, by Ewout Steyerberg, with substantial inout from Maarten van Smeden and Ben van Calster
This document summarizes the research topics and projects of the Data Analytics Group (DAG) at the University of South Australia. It discusses DAG's focus on relationship discovery, data integration and quality, text mining, outlier detection, causal modeling and reasoning, and sensor data management for water utilities. Key points include DAG having 5 academics, 4 postdocs and 15 students, $1.5M in funding, and projects with industry partners on topics like causal inference, identity resolution, medication safety surveillance, and water treatment performance assessment.
Filling the gaps in translational researchPaul Agapow
- Translational research often focuses on early-stage problems that are interesting scientifically but do not address the most important problems in developing new therapies. This neglects later and more difficult stages of drug development where the largest costs and failures occur.
- More focus is needed on developing therapies for complex, systemic diseases and diverse patient populations using real-world data and approaches that incorporate biological complexity early in the process. Machine learning should be applied where it can have the most impact in reducing costs, such as predicting adverse events later in development.
- Efforts are also needed to build more diverse, representative datasets and use data science approaches like drug repurposing that have the potential to accelerate therapy development.
In this Slides, show the some basic terminology, history, application of statistics and definition of statistics. How many Types of statistics? The Terminology is given below:
-Probability
-Scope
-Sample
-Population
-Statistical Inference
Introduction to prediction modelling - Berlin 2018 - Part IIMaarten van Smeden
This document summarizes the key steps in building a risk prediction model:
1. Conduct research design and data collection, typically using a prospective cohort study.
2. Choose statistical model, outcome, and candidate predictors based on clinical knowledge.
3. Perform initial data analysis including descriptive statistics and assessing predictors.
4. Specify and estimate the prediction model, addressing issues like handling continuous predictors and missing data.
5. Evaluate the model's performance using measures like discrimination and calibration and perform internal validation to account for overoptimism.
6. Present the final model following reporting guidelines like TRIPOD.
mat 510,stayer mat 510,stayer mat 510 complete course,stayer mat 510 entire course,stayer mat 510 week 1,stayer mat 510 week 2,stayer mat 510 week 3,stayer mat 510 week 4,stayer mat 510 week 6,stayer mat 510 week 7,stayer mat 510 week 8,stayer mat 510 week 9,mat 510 final exam new,mat 510 midterm exam new,mat 510 tutorials,mat 510 assignments,mat 510 help
Stout Healthcare Analytics Midwestern UniversityDr. Chris Stout
This document discusses the use of big data, predictive analytics, and machine learning in healthcare. It contains the following key points:
1. Predictive analytics and machine learning are increasingly being used in clinical trials to test health apps and their ability to improve outcomes. If apps are shown to reduce costs by decreasing ER visits or improving medication adherence, they could help cut healthcare costs.
2. Many hospitals are testing health and fitness apps from companies like Apple, Google, Phillips, and Samsung that integrate diverse data to create a more comprehensive health picture for providers.
3. The speaker's company has used predictive analytics on over 15,000 prior medical bills to identify treatment guidelines, automate approvals, and reduce costs
Genetic algorithms and feature selection techniques are used to analyze medical diagnosis data and predict disease. The process involves obtaining patient data, selecting relevant features, and using a genetic algorithm to evolve a mathematical model for accurate prediction. Specifically, (1) medical records are collected as training data, (2) irrelevant variables are removed via filter feature selection, and (3) a genetic algorithm simulates natural selection to iteratively improve a model for predicting disease in new patient records. This automated approach helps analyze large datasets, minimize human interaction, and facilitate timely treatment recommendations.
mat 300,strayer mat 300,mat 300 entire course new,mat 300 discussion questions,strayer mat 300 week 1,strayer mat 300 week 2,strayer mat 300 week 3,strayer mat 300 week 4,strayer mat 300 week 5,mat 300 case study,mat 300 discussion correlation and regression,mat 300 graphical representations,strayer mat 300 tutorials,strayer mat 300 assignments,mat 300 help
This document outlines the objectives and requirements for a research project being conducted by the UOEC club. Small teams will choose a topic to research, gather quantitative data, use STATA to run regressions, and answer a provided question on how independent variables affect the dependent variable. Teams are then free to further analyze the data. Each team must have an executive member experienced with econometrics. Teams will present their findings to the club. The document provides a list of objectives for participants and resources for gathering data.
Avito recsys-challenge-2016RecSys Challenge 2016: Job Recommendation Based on...Vasily Leksin
This slides describes our solution for the RecSys Challenge 2016. In the challenge, several datasets were provided from a social network for business XING. The goal of the competition was to use these data to predict job postings that a user will interact positively with (click, bookmark or reply). Our solution to this problem includes three different types of models: Factorization Machine, item-based collaborative filtering, and content-based topic model on tags. Thus, we combined collaborative and content-based approaches in our solution.
Our best submission, which was a blend of ten models, achieved 7th place in the challenge's final leaderboard with a score of 1677898.52. The approaches presented in this paper are general and scalable. Therefore they can be applied to another problem of this type.
The science of statistics deals with the collection, analysis, interpretation, and presentation of data. We see and use data in our everyday lives. The measure of whether the results of research were due to chance. The more statistical significance assigned to an observation, the less likely the observation occurred by chance.
Learn how to transform from a mild-mannered online organizer into a true data-driven mastermind! What to track, how to test, and methods for creating a data-driven culture at your nonprofit.
Cross border - off-shoring and outsourcing privacy sensitive dataUlf Mattsson
Ulf Mattsson is the CTO of Protegrity, with over 20 years of experience in research and development and global services at IBM. He has been involved in developing encryption, tokenization, and intrusion prevention technologies. The document discusses cross-border offshoring and outsourcing of privacy sensitive data in the cloud. It notes that cloud services are often provided by third parties and can involve data being stored in multiple locations. Regulations like PCI DSS and national privacy laws apply when data crosses borders or is outsourced. Sensitive data needs to be protected to comply with regulations and address threats while also enabling useful insights from the data. Methods like de-identification through tokenization and encryption can protect identifiable data
Best data science training Institute: Kellytechnologies is the best data science training Institutes in Hyderabad.Providing greate data science training by realtime faculty in hyderabad.
Statistical analysis of process data 7 stages oil flow chart power point temp...SlideTeam.net
The document describes a 7-stage process for statistical analysis of process data. It includes steps to download diagrams, capture audience attention, and analyze process data across 7 stages. The document contains repetitive text and symbols about downloading diagrams and capturing attention.
This document discusses loading data from Hadoop into Oracle databases using Oracle connectors. It describes how the Oracle Loader for Hadoop and Oracle SQL Connector for HDFS can load data from HDFS into Oracle tables much faster than traditional methods like Sqoop by leveraging parallel processing in Hadoop. The connectors optimize the loading process by automatically partitioning, sorting, and formatting the data into Oracle blocks to achieve high performance loads. Measuring the CPU time needed per gigabyte loaded allows estimating how long full loads will take based on available resources.
This document discusses big data analysis and data science. It introduces common data analysis techniques like predictive modeling, machine learning, and recommendation systems. It also discusses tools for working with big data, including Hadoop, HDFS, Pig, HBase, Mahout and languages like R and Python. The document provides an example of using these techniques and tools to build a recommendation system using streaming data from Flume stored in HDFS and analyzed with Pig and HBase.
This is presntation on how you can read a data model and understand the data and business rules contained in it. It is intended for non-technical people
Build a predictive analytics model on a terabyte of data within hoursDataWorks Summit
A predictive analytics model can be built on a terabyte of data within hours using Microsoft's ML Studio API. The process involves setting up a cloud environment, loading and exploring the data, engineering features, sampling data, building and deploying the model, and then consuming the model. ML Studio streamlines and automates each step of the machine learning process.
pandas: a Foundational Python Library for Data Analysis and StatisticsWes McKinney
Pandas is a Python library for data analysis and manipulation. It provides high performance tools for structured data, including DataFrame objects for tabular data with row and column indexes. Pandas aims to have a clean and consistent API that is both performant and easy to use for tasks like data cleaning, aggregation, reshaping and merging of data.
The data model is dead, long live the data modelPatrick McFadin
The document discusses how data modeling concepts translate from relational databases to Cassandra. It begins with background on how Cassandra stores data using a row key and columns rather than tables and relations. Common patterns like one-to-many and many-to-many relationships are achieved without foreign keys by duplicating and denormalizing data. The document also covers concepts like UUIDs, transactions, and how some relational features like sequences are handled differently in Cassandra.
Python Data Wrangling: Preparing for the FutureWes McKinney
The document is a slide deck for a presentation on Python data wrangling and the future of the pandas project. It discusses the growth of the Python data science community and key projects like NumPy, pandas, and scikit-learn that have contributed to pandas' popularity. It outlines some issues with the current pandas codebase and proposes a new C++-based core called libpandas for pandas 2.0 to improve performance and interoperability. Benchmark results show serialization formats like Arrow and Feather outperforming pickle and CSV for transferring data.
pandas: Powerful data analysis tools for PythonWes McKinney
Wes McKinney introduced pandas, a Python data analysis library built on NumPy. Pandas provides data structures and tools for cleaning, manipulating, and working with relational and time-series data. Key features include DataFrame for 2D data, hierarchical indexing, merging and joining data, and grouping and aggregating data. Pandas is used heavily in financial applications and has over 1500 unit tests, ensuring stability and reliability. Future goals include better time series handling and integration with other Python data science packages.
To download please go to: http://www.intelligentmining.com/knowledge-base.html
Slides as presented by Alex Lin to the NYC Predictive Analytics Meetup group: http://www.meetup.com/NYC-Predictive-Analytics/ on April 1, 2010 (no joke!) :)
Explore Your Data Using Amazon QuickSight and Build Your First Machine Learni...Amazon Web Services
In this session we will demonstrate how non-experts in machine learning, can easily analyze their data with QuickSight and build scalable and production-ready predictive models with Amazon machine learning. After the session you will have a good understanding how to define problems from your business, in terms of data and predictive models, and you will be able to apply analytics and machine learning concepts as a competitive advantage.
Python for Financial Data Analysis with pandasWes McKinney
This document discusses using Python and the pandas library for financial data analysis. It provides an overview of pandas, describing it as a tool that offers rich data structures and SQL-like functionality for working with time series and cross-sectional data. The document also outlines some key advantages of Python for financial data analysis tasks, such as its simple syntax, powerful built-in data types, and large standard library.
Improving Python and Spark (PySpark) Performance and InteroperabilityWes McKinney
Slides from Spark Summit East 2017 — February 9, 2017 in Boston. Discusses ongoing development work to accelerate Python-on-Spark performance using Apache Arrow and other tools
Correctness in Data Science - Data Science Pop-up SeattleDomino Data Lab
Presented by: Benjamin S. Skrainka is a Principal Data Scientist and Lead Instructor at Galvanize, Inc. For several decades, he has built practical solutions to relevant problems using the best statistical and engineering tools. His expertise spans several problem domains, including sequencing DNA, estimating demand for differentiated products, measuring advertising efficacy, and forecasting for capacity planning. Ben earned an AB in Physics from Princeton University and a PhD in Economics from University College London.
No estimates - 10 new principles for testingVasco Duarte
This document outlines 10 principles for software development without estimates. It begins by discussing trusting or changing your process (Principle 1) and shortening feedback cycles (Principle 2). Data is presented showing estimates are often inaccurate, with 80% of projects being late or over budget. Principle 3 states to believe data over estimates. Alternatives to estimate-driven decision making are suggested in Principle 4. Principles 5-8 discuss testing for value, measuring progress with working software, and understanding predictable system outputs. Principle 9 advocates using methods with proven track records over hoping estimates will improve. The transformation begins with individuals, per Principle 10.
The document discusses challenges in analytics for big data. It notes that big data refers to data that exceeds the capabilities of conventional algorithms and techniques to derive useful value. Some key challenges discussed include handling the large volume, high velocity, and variety of data types from different sources. Additional challenges include scalability for hierarchical and temporal data, representing uncertainty, and making the results understandable to users. The document advocates for distributed analytics from the edge to the cloud to help address issues of scale.
Tips and Tricks to be an Effective Data ScientistLisa Cohen
Data Science is an evolving field, that requires a diverse skill set. From Analytical Techniques to Career Advice, this talk is full of practical tips that you can apply immediately to your job.
According to recent research report by Wall Street Journal, AI project failure rates near 50%, more than 53% terminates at proof of concept level and does not make it to production. Gartner report says that nearly 80% of the analytics projects are not delivering any business value. That means for every 10 projects, only 2 projects are useful to the organization. Let us pause here a moment, rather than looking at what makes AI projects to fail, let’s look at the challenges involved in AI projects and find a solution to overcome these challenges.
AI projects are different from traditional software projects. Typical software projects, as shown in Figure 1, consist of well-defined software requirements, high level design, coding, unit testing, system testing, and deployment along with beta testing or field testing. Now, organizations are adopting Agile process instead of traditional V or waterfall model, but still steps mentioned are valid.
However, AI and Machine Learning projects’ methodology is different from the above. Our experience working on many AI/ML projects has given us insights on some of the challenges of executing AI projects. Also, we are in regular touch with senior executives and thought leaders from different industries who understand the success formula. The following discussion is based on our practical experience and knowledge gained in the field.
Successful execution of AI projects depends on the following factors:
1. Clearly aligned Business Expectations
2. Clarity on Terminologies
3. Meeting Data Requirements
4. Tools and Technology
5. Right Resources
6. Understanding Output Results
7. Project Planning and the Process
Data Science For Beginners | Who Is A Data Scientist? | Data Science Tutorial...Edureka!
This document outlines an agenda for a data science training presentation. The agenda includes sections on why data science, what data science is, who a data scientist is, what they do, how to solve problems in data science, data science tools, and a demo. Key points are that data science uses tools, algorithms and machine learning to discover patterns in raw data and gain insights. It involves tasks like processing, cleaning, mining and modeling data, as well as communicating results. The problem solving process involves discovery, preparation, planning, building, operationalizing and communicating models.
Machine Learning & IT Service Intelligence for the Enterprise: The Future is ...Precisely
Enterprises with mainframes and Cloud/server architectures face unique issues and challenges and if your enterprise delivers a service whose operation spans mainframe and distributed and/or Cloud infrastructures (e.g. a mobile banking/customer app), this webinar is for you.
See how you can gain unique business and service-relevant context using your own machine data, including that from your z/OS mainframe. Implicitly learn patterns, eliminate costly false alerts, identify anomalies, and baseline normal operations by employing advanced analytics driven by machine learning. You’ll also see and learn about:
• Accelerating root-cause analysis and getting ahead of customer-impacting outages and slow-downs for your service
• “Glass Table” view for clickable visualization of the entire service-relevant infrastructure
• Machine Learning in IT Service Intelligence
• The Machine Learning Toolkit available today
Navy security contest-bigdataforsecuritystelligence
This document discusses using machine learning for security monitoring. It begins with an overview of why machine learning is useful for security monitoring and provides a high-level overview of machine learning concepts. It then discusses applying machine learning to practical security use cases like fraud detection, network anomaly detection, and predicting attack behaviors. Specific machine learning techniques like supervised learning, unsupervised learning, and anomaly detection are also discussed. Finally, it provides an example workflow for using machine learning in a security data science process.
Claudia Gold: Learning Data Science Onlinesfdatascience
Claudia Gold, author of the Data Analysis Learning path on SlideRule, talks about why she wrote it and how to approach learning data science on your own. https://www.mysliderule.com/learning-paths/data-analysis/
The document discusses machine learning and data science concepts. It begins with an introduction to machine learning and the machine learning process. It then provides an overview of select machine learning algorithms and concepts like bias/variance, generalization, underfitting and overfitting. It also discusses ensemble methods. The document then shifts to discussing time series, functions for manipulating time series, and laying the foundation for time series prediction and forecasting. It provides examples of applying techniques like median filtering to smooth time series data. Overall, the document provides a high-level introduction and overview of key machine learning and time series concepts.
MLOps and Data Quality: Deploying Reliable ML Models in ProductionProvectus
Looking to build a robust machine learning infrastructure to streamline MLOps? Learn from Provectus experts how to ensure the success of your MLOps initiative by implementing Data QA components in your ML infrastructure.
For most organizations, the development of multiple machine learning models, their deployment and maintenance in production are relatively new tasks. Join Provectus as we explain how to build an end-to-end infrastructure for machine learning, with a focus on data quality and metadata management, to standardize and streamline machine learning life cycle management (MLOps).
Agenda
- Data Quality and why it matters
- Challenges and solutions of Data Testing
- Challenges and solutions of Model Testing
- MLOps pipelines and why they matter
- How to expand validation pipelines for Data Quality
This document summarizes Michał Łopuszyński's presentation on using an agile approach based on the CRISP-DM methodology for data mining projects. It discusses the key phases of CRISP-DM including business understanding, data understanding, data preparation, modelling, evaluation, and deployment. For each phase, it provides examples of best practices and challenges, with an emphasis on spending sufficient time on data understanding and preparation, developing models with the deployment context in mind, and carefully evaluating results against business objectives.
Slides from my presentation at the Data Intelligence conference in Washington DC (6/23/2017). See this link for the abstract: http://www.data-intelligence.ai/presentations/36
Predictive Model and Record Description with Segmented Sensitivity Analysis (...Greg Makowski
Describing a predictive data mining model can provide a competitive advantage for solving business problems with a model. The SSA approach can also provide reasons for the forecast for each record. This can help drive investigations into fields and interactions during a data mining project, as well as identifying "data drift" between the original training data, and the current scoring data. I am working on open source version of SSA, first in R.
Kathi Plankensteiner outlines common mistakes and misconceptions in data science projects. She notes that data preparation and understanding takes around 80% of project time. Key mistakes include improper model selection that does not account for data characteristics, overfitting models to training data, and failing to distinguish between correlation and causation in results. It is important to visualize error distributions rather than just reporting model fit metrics and avoid extrapolating beyond the available data. Overall, thorough data exploration and understanding the problem domain are essential for successful data science projects.
Data mining is the statistical technique of processing raw data in a structur...ssuser6478a8
This document provides information about the CS583 - Data Mining and Text Mining course. It includes details about the instructor, meeting times, course structure, grading breakdown, prerequisites and topics to be covered. The course will include lectures, two programming assignments to be demonstrated individually, and reading research papers. Grades will be based on a final exam, midterm, and programming assignments. Knowledge of basic probability and algorithms is required. Topics covered will include data preprocessing, association rule mining, classification, clustering, text mining and more.
Disrupting Risk Management through Emerging TechnologiesDatabricks
The document discusses how emerging technologies can disrupt credit risk management by 2025, noting banks will need fundamentally different risk functions to handle new demands. It describes what credit risk management is and some ways emerging technologies like machine learning, analytics tools, and interactive insights bots could be leveraged to perform deep 6W analysis, zero-touch forecasting, monitoring, and "what-if" scenario modeling at scale to help risk managers address what is at stake. Sample interactions with an interactive insights bot are provided to demonstrate how it could provide executives quick insights and predictions by feature in response to natural language requests.
Breed data scientists_ A Presentation.pptxGautamPopli1
The document discusses changes in the field of data science, including more available data, improved tools and cloud technologies, and the need for multi-disciplinary teams and standardized processes. It highlights the importance of data quality and engineering, noting that data scientists spend most of their time cleaning and organizing data. The Microsoft "Team Data Science Process" is presented as a standardized approach for data science projects using tools like Visual Studio Team Services. Resources like Coursera courses and libraries from Microsoft and Cloudera are recommended to learn skills and technologies in the field.
Some insights from a Systematic Mapping Study and a Systematic Review Study: ...Phu H. Nguyen
Doing literature reviews is a must for us (researchers) to avoid reinventing the wheel, and to expand the boundary of knowledge. Why not having fun with the snowballing technique and conducting the reviews systematically? This talk shares some insights from a Systematic Mapping Study (SMS) and a Systematic Literature Review (SLR). When to conduct a SMS? When to conduct a SLR? What are the differences?
Analysis insight about a Flyball dog competition team's performanceroli9797
Insight of my analysis about a Flyball dog competition team's last year performance. Find more: https://github.com/rolandnagy-ds/flyball_race_analysis/tree/main
Codeless Generative AI Pipelines
(GenAI with Milvus)
https://ml.dssconf.pl/user.html#!/lecture/DSSML24-041a/rate
Discover the potential of real-time streaming in the context of GenAI as we delve into the intricacies of Apache NiFi and its capabilities. Learn how this tool can significantly simplify the data engineering workflow for GenAI applications, allowing you to focus on the creative aspects rather than the technical complexities. I will guide you through practical examples and use cases, showing the impact of automation on prompt building. From data ingestion to transformation and delivery, witness how Apache NiFi streamlines the entire pipeline, ensuring a smooth and hassle-free experience.
Timothy Spann
https://www.youtube.com/@FLaNK-Stack
https://medium.com/@tspann
https://www.datainmotion.dev/
milvus, unstructured data, vector database, zilliz, cloud, vectors, python, deep learning, generative ai, genai, nifi, kafka, flink, streaming, iot, edge
4th Modern Marketing Reckoner by MMA Global India & Group M: 60+ experts on W...Social Samosa
The Modern Marketing Reckoner (MMR) is a comprehensive resource packed with POVs from 60+ industry leaders on how AI is transforming the 4 key pillars of marketing – product, place, price and promotions.
Learn SQL from basic queries to Advance queriesmanishkhaire30
Dive into the world of data analysis with our comprehensive guide on mastering SQL! This presentation offers a practical approach to learning SQL, focusing on real-world applications and hands-on practice. Whether you're a beginner or looking to sharpen your skills, this guide provides the tools you need to extract, analyze, and interpret data effectively.
Key Highlights:
Foundations of SQL: Understand the basics of SQL, including data retrieval, filtering, and aggregation.
Advanced Queries: Learn to craft complex queries to uncover deep insights from your data.
Data Trends and Patterns: Discover how to identify and interpret trends and patterns in your datasets.
Practical Examples: Follow step-by-step examples to apply SQL techniques in real-world scenarios.
Actionable Insights: Gain the skills to derive actionable insights that drive informed decision-making.
Join us on this journey to enhance your data analysis capabilities and unlock the full potential of SQL. Perfect for data enthusiasts, analysts, and anyone eager to harness the power of data!
#DataAnalysis #SQL #LearningSQL #DataInsights #DataScience #Analytics
The Ipsos - AI - Monitor 2024 Report.pdfSocial Samosa
According to Ipsos AI Monitor's 2024 report, 65% Indians said that products and services using AI have profoundly changed their daily life in the past 3-5 years.
ViewShift: Hassle-free Dynamic Policy Enforcement for Every Data LakeWalaa Eldin Moustafa
Dynamic policy enforcement is becoming an increasingly important topic in today’s world where data privacy and compliance is a top priority for companies, individuals, and regulators alike. In these slides, we discuss how LinkedIn implements a powerful dynamic policy enforcement engine, called ViewShift, and integrates it within its data lake. We show the query engine architecture and how catalog implementations can automatically route table resolutions to compliance-enforcing SQL views. Such views have a set of very interesting properties: (1) They are auto-generated from declarative data annotations. (2) They respect user-level consent and preferences (3) They are context-aware, encoding a different set of transformations for different use cases (4) They are portable; while the SQL logic is only implemented in one SQL dialect, it is accessible in all engines.
#SQL #Views #Privacy #Compliance #DataLake
The Building Blocks of QuestDB, a Time Series Databasejavier ramirez
Talk Delivered at Valencia Codes Meetup 2024-06.
Traditionally, databases have treated timestamps just as another data type. However, when performing real-time analytics, timestamps should be first class citizens and we need rich time semantics to get the most out of our data. We also need to deal with ever growing datasets while keeping performant, which is as fun as it sounds.
It is no wonder time-series databases are now more popular than ever before. Join me in this session to learn about the internal architecture and building blocks of QuestDB, an open source time-series database designed for speed. We will also review a history of some of the changes we have gone over the past two years to deal with late and unordered data, non-blocking writes, read-replicas, or faster batch ingestion.
Predictably Improve Your B2B Tech Company's Performance by Leveraging DataKiwi Creative
Harness the power of AI-backed reports, benchmarking and data analysis to predict trends and detect anomalies in your marketing efforts.
Peter Caputa, CEO at Databox, reveals how you can discover the strategies and tools to increase your growth rate (and margins!).
From metrics to track to data habits to pick up, enhance your reporting for powerful insights to improve your B2B tech company's marketing.
- - -
This is the webinar recording from the June 2024 HubSpot User Group (HUG) for B2B Technology USA.
Watch the video recording at https://youtu.be/5vjwGfPN9lw
Sign up for future HUG events at https://events.hubspot.com/b2b-technology-usa/
Beyond the Basics of A/B Tests: Highly Innovative Experimentation Tactics You...Aggregage
This webinar will explore cutting-edge, less familiar but powerful experimentation methodologies which address well-known limitations of standard A/B Testing. Designed for data and product leaders, this session aims to inspire the embrace of innovative approaches and provide insights into the frontiers of experimentation!
1. Tune up your data science process
Benjamin S. Skrainka
February 10, 2016
Benjamin S. Skrainka Tune up your data science process February 10, 2016 1 / 24
2. The correctness problem
A lot of (data) science is unscientific:
“My code runs, so the answer must be correct”
“It passed Explain Plan, so the answer is correct”
“This model is too complex to have a design document”
“It is impossible to unit test scientific code”
“The lift from the direct mail campaign is 10%”
Benjamin S. Skrainka Tune up your data science process February 10, 2016 2 / 24
3. Correctness matters
Bad (data) science:
Costs real money and can kill people
Will eventually damage your reputation and career
Could expose you to litigation
An issue of basic integrity and sleeping at night
Benjamin S. Skrainka Tune up your data science process February 10, 2016 3 / 24
4. Objectives
Today’s goals:
Introduce VV&UQ framework to evaluate correctness of scientific
models
Survey good habits to improve quality of your work
Benjamin S. Skrainka Tune up your data science process February 10, 2016 4 / 24
5. Verification, Validation, & Uncertainty Quantification
Benjamin S. Skrainka Tune up your data science process February 10, 2016 5 / 24
6. Introduction to VV&UQ
Verification, Validation, & Uncertainty Quantification provides
epistemological framework to evaluate correctness of scientific models:
Evidence of correctness should accompany any prediction
In absence of evidence, assume predictions are wrong
Popper: can only disprove or fail to disprove a model
VV&UQ is inductive whereas science is deductive
Reference: Verification and Validation in Scientific Computing by
Oberkampf & Roy
Benjamin S. Skrainka Tune up your data science process February 10, 2016 6 / 24
7. Definitions of VV&UQ
Definitions of terms (Oberkampf & Roy):
Verification:
“solving equations right”
I.e., code implements the model correctly
Validation:
“solving right equations”
I.e., model has high fidelity to reality
Definitions of VV&UQ will vary depending on source . . .
→ Most organizations do not even practice verification. . .
Benjamin S. Skrainka Tune up your data science process February 10, 2016 7 / 24
8. Definition of UQ
Definition of Uncertainty Quantification (Oberkampf & Roy):
Process of identifying, characterizing, and quantifying those
factors in an analysis which could affect accuracy of
computational results
Do your assumptions hold? When do they fail?
Does your model apply to the data/situation?
Where does your model break down? What are its limits?
Benjamin S. Skrainka Tune up your data science process February 10, 2016 8 / 24
9. Verification of code
Does your code implement the model correctly?
Unit test everything you can:
Scientific code can be unit tested
Test special cases
Test on cases with analytic solutions
Test on synthetic data
Unit test framework will setup and tear-down fixtures
Should be able to recover parameters from Monte Carlo data
Benjamin S. Skrainka Tune up your data science process February 10, 2016 9 / 24
10. Verification of SQL
Passing Explain Plan doesn’t mean your SQL is correct:
Garbage in, garbage out
Check a simple case you can compute by hand
Check join plan is correct
Check aggregate statistics
Check answer is compatible with reality
Benjamin S. Skrainka Tune up your data science process February 10, 2016 10 / 24
11. Unit test
import unittest2 as unittest
import assignment as problems
class TestAssignment(unittest.TestCase):
def test_zero(self):
result = problems.question_zero()
self.assertEqual(result, 9198)
...
if __name__ == '__main__':
unittest.main()
Benjamin S. Skrainka Tune up your data science process February 10, 2016 11 / 24
13. Validation of model
Check your model is a good (enough) representation of reality:
“All models are wrong but some are useful” – George Box
Run an experiment
Perform specification testing
Test assumptions hold
Beware of endogenous features
Benjamin S. Skrainka Tune up your data science process February 10, 2016 13 / 24
14. Approaches to experimentation
Many ways to test:
A/B test
Multi-armed bandit
Bayesian A/B test
Wald sequential analysis
Benjamin S. Skrainka Tune up your data science process February 10, 2016 14 / 24
15. Uncertainty quantification
There are many types of uncertainty which affect the robustness of your
model:
Parameter uncertainty
Structural uncertainty
Algorithmic uncertainty
Experimental uncertainty
Interpolation uncertainty
Classified as aleatoric (statistical) and epistemic (systematic)
Benjamin S. Skrainka Tune up your data science process February 10, 2016 15 / 24
16. Good habits
Benjamin S. Skrainka Tune up your data science process February 10, 2016 16 / 24
17. Act like a software engineer
Use best practices from software engineering:
Good design of code
Follow a sensible coding convention
Version control
Use same file structure for every project
Unit test
Use PEP8 or equivalent
Perform code reviews
Benjamin S. Skrainka Tune up your data science process February 10, 2016 17 / 24
18. Reproducible research
‘Document what you do and do what you document’:
Keep a journal!
Data provenance
How data was cleaned
Design document
Specification & requirements
Do you keep a journal? You should. Fermi taught me that. –
John A. Wheeler
Benjamin S. Skrainka Tune up your data science process February 10, 2016 18 / 24
19. Follow a workflow
Use a workflow like CRISP-DM:
1 Define business question and metric
2 Understand data
3 Prepare data
4 Build model
5 Evaluate
6 Deploy
Ensures you don’t forget any key steps
Benjamin S. Skrainka Tune up your data science process February 10, 2016 19 / 24
20. Automate your data pipeline
One-touch build of your application or paper:
Automate entire workflow from raw data to final result
Ensures you perform all steps
Ensures all steps are known – no one off manual adjustments
Avoids stupid human errors
Auto generate all tables and figures
Save time when handling new data . . . which always has subtle
changes in formatting
Benjamin S. Skrainka Tune up your data science process February 10, 2016 20 / 24
21. Write flexible code to handle data
Use constants/macros to access data fields:
Code will clearly show what data matters
Easier to understand code and data pipeline
Easier to debug data problems
Easier to handles changes in data formatting
Benjamin S. Skrainka Tune up your data science process February 10, 2016 21 / 24
22. Python example
# Setup indicators
ix_gdp = 7
...
# Load & clean data
m_raw = np.recfromcsv('bea_gdp.csv')
gdp = m_raw[:, ix_gdp]
...
Benjamin S. Skrainka Tune up your data science process February 10, 2016 22 / 24
23. Politics. . .
Often, there is political pressure to violate best practice:
Examples:
80% confidence intervals
Absurd attribution window
Two year forecast horizon but only three months of data
Hard to do right thing vs. senior management
Recruit a high-level scientist to advocate
Particularly common with forecasting:
Often requested by management for CYA
Insist on a ‘panel of experts’ for impossible decisions
Benjamin S. Skrainka Tune up your data science process February 10, 2016 23 / 24
24. Conclusion
Need to raise the quality of data science:
VV & UQ provides rigorous framework:
Verification: solve the equations right
Validation: solve the right equations
Uncertainty quantification: how robust is model to unknowns?
Adopting good habits provides huge gains for minimal effort
Benjamin S. Skrainka Tune up your data science process February 10, 2016 24 / 24