This document provides an overview of various statistical tools and methods for data analysis in research. It discusses topics such as probability, probability distributions, measurement scales for data, different types of statistical analyses including descriptive analysis, difference analysis, relationship analysis, predictive analysis, and analysis through classification. Specific statistical tests and methods are described for each type of analysis. The assumptions of classical linear regression models are also outlined.
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Part of a lectures series for the international summer course in metabolomics 2013 (http://metabolomics.ucdavis.edu/courses-and-seminars/courses). Get more material and information here (http://imdevsoftware.wordpress.com/2013/09/08/sessions-in-metabolomics-2013/).
Strategies for Metabolomics Data AnalysisDmitry Grapov
Part of a lectures series for the international summer course in metabolomics 2013 (http://metabolomics.ucdavis.edu/courses-and-seminars/courses). Get more material and information here (http://imdevsoftware.wordpress.com/2013/09/08/sessions-in-metabolomics-2013/).
Outlier detection using machine learning, deep learning as well as statistical analysis.
The slide includes time series analysis. Also included is the hands on exercises with code and data, for a 3-day course.
This presentation educates you about Linear Regression, SPSS Linear regression, Linear regression method, Why linear regression is important?, Assumptions of effective linear regression and Linear-regression assumptions.
For more topics stay tuned with Learnbay.
Data Analysis: Statistical Methods: Regression modelling, Multivariate Analysis - Classification: SVM & Kernel Methods - Rule Mining - Cluster Analysis, Types of Data in Cluster Analysis, Partitioning Methods, Hierarchical Methods, Density Based Methods, Grid Based Methods, Model Based Clustering Methods, Clustering High Dimensional Data - Predictive Analytics – Data analysis using R.
Outlier detection using machine learning, deep learning as well as statistical analysis.
The slide includes time series analysis. Also included is the hands on exercises with code and data, for a 3-day course.
This presentation educates you about Linear Regression, SPSS Linear regression, Linear regression method, Why linear regression is important?, Assumptions of effective linear regression and Linear-regression assumptions.
For more topics stay tuned with Learnbay.
Data Analysis: Statistical Methods: Regression modelling, Multivariate Analysis - Classification: SVM & Kernel Methods - Rule Mining - Cluster Analysis, Types of Data in Cluster Analysis, Partitioning Methods, Hierarchical Methods, Density Based Methods, Grid Based Methods, Model Based Clustering Methods, Clustering High Dimensional Data - Predictive Analytics – Data analysis using R.
Explore our comprehensive data analysis project presentation on predicting product ad campaign performance. Learn how data-driven insights can optimize your marketing strategies and enhance campaign effectiveness. Perfect for professionals and students looking to understand the power of data analysis in advertising. for more details visit: https://bostoninstituteofanalytics.org/data-science-and-artificial-intelligence/
Chatty Kathy - UNC Bootcamp Final Project Presentation - Final Version - 5.23...John Andrews
SlideShare Description for "Chatty Kathy - UNC Bootcamp Final Project Presentation"
Title: Chatty Kathy: Enhancing Physical Activity Among Older Adults
Description:
Discover how Chatty Kathy, an innovative project developed at the UNC Bootcamp, aims to tackle the challenge of low physical activity among older adults. Our AI-driven solution uses peer interaction to boost and sustain exercise levels, significantly improving health outcomes. This presentation covers our problem statement, the rationale behind Chatty Kathy, synthetic data and persona creation, model performance metrics, a visual demonstration of the project, and potential future developments. Join us for an insightful Q&A session to explore the potential of this groundbreaking project.
Project Team: Jay Requarth, Jana Avery, John Andrews, Dr. Dick Davis II, Nee Buntoum, Nam Yeongjin & Mat Nicholas
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Innovative Methods in Media and Communication Research by Sebastian Kubitschk...
Statistical analysis for researchJJ.ppt
1. Application of Statistical Tools
for Data Analysis in Research
Dr Joseph James V.
Professor of Commerce & Management, MSN
Institute of Management & Technology, Chavara.
(Formerly Associate Professor
and Head, P G & Research
Department of Commerce, Fatima
Mata National College
(Autonomous), Kollam).
2. Probability
Approaches towards Probability
Basic terminology
◦ Experiments and events
◦ Mutually exclusive events
◦ Collectively exhaustive events/ sample space
◦ Equally likely events
◦ Independent and Dependant events
◦ Simple and compound events
3. Theorems of Probability
Addition Theorem
◦ Mutually exclusive cases
◦ Not mutually exclusive cases
Multiplication Theorem (Joint Probability)
◦ Under statistical independence
◦ Under statistical dependence
Conditional probability
Revision of probability
◦ Bayes’ Theorem
Mathematical Expectation
Probability/Theoretical Distribution
4. Statistical Data
• Measurement Scales
• Nominal
• Ordinal
• Interval
• Scale/Ratio
• Data Types
• Simple, Discrete and Continuous Data
• Temporal/Time series Data
• Cross Sectional Data
• Pooled Data
• Panel Data
5. A Broad Classification of
Statistical Analysis
Descriptive Analysis
Difference Analysis
Relationship Analysis
Predictive Analysis
Analysis through Classification
6. Descriptive Analysis
Describe the characteristics of the data/
distribution in a summary form
Tools.
• Measures of central tendency
Mean, Median, Mode, Partition values, GM, HM,
Specialised Averages like Index Numbers
• Measures of dispersion
• Skewness /Asymmetry
• Kurtosis / Peakness or flatness
7. Difference Analysis
As to whether a statistic is significantly
different from the population parameter
◦ Crosstab and Chi square test in the case of
categorical variables
◦ In case of Ordinal or better:
Independent samples – Mann Whitney U Test
Dependant samples – Wilcox sign test
◦ Scale/Ratio
One variable – t test, one way ANOVA
Two or more samples – ANOVA, MANOVA,
MANCOVA etc.
9. Predictive Analysis
• Simple regression
–Uses of Regression Analysis
–The regression lines
–The regression equations
–Properties of regression coefficients
–Standard error of estimate
–The coefficient of determination (r2)
• Multiple regression analysis
–E(Y) = a + b1X1 + b2X2 + …..bjXj + eij
10. Interpretation of Regression
Result
• Descriptive Statistics
• Correlations
• Variables Entered/Removed(Stepwise
regression)
• Model Summary(R,R square, Adj R
square& SE
• ANOVA – p value
• Coefficients (Constant, B -
unstandardized, Beta - standardized, SE,
t test and p values , Confidence limits)
11. Assumptions of Classical Linear
Regression Model (CLRM)
• Assumption of Linearity
Correlation and Scatter plot
• Assumption of Normality
– Histogram and a fitted normal curve or a Q-Q-Plot.
– Box plots
– Descriptive statistics using skewness and kurtosis
– Normality can be checked with a goodness of fit test,
e.g., the Kolmogorov-Smirnov test or by Shapiro Wilk
test or by Jarque – Bera test available in Eviews
• When the data is not normally distributed a non-
linear transformation, e.g., log-transformation
might fix this issue, however it can introduce
effects of multi collinearity.
12. Assumptions of Classical Linear
Regression Model (CLRM)
• Assumption of Stationarity.
– first differencing and Second differencing
– smoothed by performing regression on a deterministic
time scale and generating expected values.
– unit root test - Augmented Dickey Fuller (ADF)
• Assumption of Homoscedasticity (problem of
Hetroscedasticity)
Test that there is no outlier
The data points are independent (No
autocorrelation within the variables) –
Durbin Watson test.
The residuals are normally distributed with mean zero
and have constant variance - Residual statistics and
Histogram of the residuals
13. Assumptions of Classical Linear
Regression Model (CLRM)
Assumption of Autocorrelation
◦ DW statistics
◦ Correlogram Q statistic – Eviews output
Autocorrelation and Partial Autocorrelation
Problem of Multicolleaniarity
◦ Correlation matrix
◦ Tolerance and Variance Inflation Factor
(VIF).
14. Test for Specification error
• Ramsey’s RESET
–Single test which gives an overall idea on the
presence of specification error arising out of
inadequacy of the model specification,
measurement errors and errors with respect to
normality.
–The model, in order to be precise and suitable,
the coefficient of the fitted values when
regressed on the dependent variable along with
the independent variable should be equal to
zero. Ramsey’s RESET is a test in this direction
15. Test for Specification error
• Ramsey’s RESET
• Estimate the LRM, Y = α + β1X1+ β2X2+………+
βjXj + ej and save the fitted values.
• Include the combination of the powered values of
predicted (fitted) values of Y2, Y3… ) in the model
and regress again to test whether the coefficient
of fitted values (γ) = 0 against the model:
Y = α + β1X1+ β2X2+………+ βjXj + γ1Y2 + γ2Y3
+ ej
• The significance of γ (coefficients of squired
fitted values, 3rd power of fitted values etc. are
tested using F test for generalization.
• Eviews example