This document discusses correlation analysis. It defines correlation as the degree of relationship between two random variables. Correlation can be positive, negative, simple, partial, or multiple depending on the direction and number of variables. Linear correlation means changes in one variable are proportionally related to changes in the other. Non-linear correlation means changes are not proportional. Correlation is measured using the correlation coefficient r, which ranges from -1 to 1. A higher absolute r value means stronger correlation. Correlation only indicates relationship and not causation. The document also covers probable error and coefficient of determination in interpreting correlation results.
HOW IS IT USEFUL IN FIELD OF FORENSIC SCIENCE AND IN THIS I HAVE SHOWN THE TYPES OF CORRELATION, SIGNIFICANCE , METHODS AND KARL PEARSON'S METHOD OF CORRELATION
Brief description of the concepts related to correlation analysis. Problem Sums related to Karl Pearson's Correlation, Spearman's Rank Correlation, Coefficient of Concurrent Deviation, Correlation of a grouped data.
HOW IS IT USEFUL IN FIELD OF FORENSIC SCIENCE AND IN THIS I HAVE SHOWN THE TYPES OF CORRELATION, SIGNIFICANCE , METHODS AND KARL PEARSON'S METHOD OF CORRELATION
Brief description of the concepts related to correlation analysis. Problem Sums related to Karl Pearson's Correlation, Spearman's Rank Correlation, Coefficient of Concurrent Deviation, Correlation of a grouped data.
Correlation and regression.
It shows different aspects of Correlation and regression.
A small comparison of these two is also listed in this presentation.
Multiple regression analysis is a powerful technique used for predicting the unknown value of a variable from the known value of two or more variables.
A simple explanation of Regression | Regression versus Causation | Regression versus Correlation
The presentation aims at explaining the basic concept of regression. It also shows how regression is different from causation and correlation.
For further explanation, checkout the youtube link: https://youtu.be/SELNQs9b-XY
This presentation covered the following topics:
1. Definition of Correlation and Regression
2. Meaning of Correlation and Regression
3. Types of Correlation and Regression
4. Karl Pearson's methods of correlation
5. Bivariate Grouped data method
6. Spearman's Rank correlation Method
7. Scattered diagram method
8. Interpretation of correlation coefficient
9. Lines of Regression
10. regression Equations
11. Difference between correlation and regression
12. Related examples
To get a copy of the slides for free Email me at: japhethmuthama@gmail.com
You can also support my PhD studies by donating a 1 dollar to my PayPal.
PayPal ID is japhethmuthama@gmail.com
Your data is in Prometheus, now what? (CurrencyFair Engineering Meetup, 2016)Brian Brazil
Prometheus is a next-generation monitoring system with a time series database at it's core. Once you have a time series database, what do you do with it though? This talk will look at getting data in, and more importantly how to use the data you collect productively.
Contact us at prometheus@robustperception.io
Correlation and regression.
It shows different aspects of Correlation and regression.
A small comparison of these two is also listed in this presentation.
Multiple regression analysis is a powerful technique used for predicting the unknown value of a variable from the known value of two or more variables.
A simple explanation of Regression | Regression versus Causation | Regression versus Correlation
The presentation aims at explaining the basic concept of regression. It also shows how regression is different from causation and correlation.
For further explanation, checkout the youtube link: https://youtu.be/SELNQs9b-XY
This presentation covered the following topics:
1. Definition of Correlation and Regression
2. Meaning of Correlation and Regression
3. Types of Correlation and Regression
4. Karl Pearson's methods of correlation
5. Bivariate Grouped data method
6. Spearman's Rank correlation Method
7. Scattered diagram method
8. Interpretation of correlation coefficient
9. Lines of Regression
10. regression Equations
11. Difference between correlation and regression
12. Related examples
To get a copy of the slides for free Email me at: japhethmuthama@gmail.com
You can also support my PhD studies by donating a 1 dollar to my PayPal.
PayPal ID is japhethmuthama@gmail.com
Your data is in Prometheus, now what? (CurrencyFair Engineering Meetup, 2016)Brian Brazil
Prometheus is a next-generation monitoring system with a time series database at it's core. Once you have a time series database, what do you do with it though? This talk will look at getting data in, and more importantly how to use the data you collect productively.
Contact us at prometheus@robustperception.io
It is most useful for the students of BBA for the subject of "Data Analysis and Modeling"/
It has covered the content of chapter- Data regression Model
Visit for more on www.ramkumarshah.com.np/
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http://sandymillin.wordpress.com/iateflwebinar2024
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Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
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This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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2. Introduction
Correlation a LINEAR association between
two random variables
Correlation analysis show us how to
determine both the nature and strength of
relationship between two variables
When variables are dependent on time
correlation is applied
Correlation lies between +1 to -1
3. Meaning of Correlation
Analysis
Correlation is the degree of inter-relatedness
among the two or more variables.
Correlation analysis is a process to find out
the degree of relationship between two or
more variables by applying various
statistical tools and techniques.
According to Conner
“if two or more quantities vary in sympathy, so
that movement in one tend to be
accompanied by corresponding movements
in the other , then they said to be
correlated.”
4. Three Stages to solve correlation
problem :
Determination of relationship, if yes,
measure it.
Significance of correlation.
Establishing the cause and effect
relationship, if any.
5. Uses of Correlation Analysis
It is used in deriving the degree and
direction of relationship within the
variables.
It is used in reducing the range of
uncertainty in matter of prediction.
It I used in presenting the average
relationship between any two
variables through a single value of
coefficient of correlation.
6. Uses of Correlation
Analysis
In the field of science and philosophy
these methods are used for making
progressive conclusions.
In the field of nature also, it is used in
observing the multiplicity of the inter
related forces.
7. Types of correlation
On the basis of
degree of
correlation
On the basis of
number of variables
On the basis of
linearity
•Positive
correlation
•Negative
correlation
•Simple
correlation
•Partial correlation
•Multiple
correlation
•Linear
correlation
•Non – linear
correlation
8.
9. Correlation : On the basis of
degree
Positive Correlation
if one variable is increasing and with its
impact on average other variable is
also increasing that will be positive
correlation.
For example :
Income ( Rs.) : 350360 370 380
Weight ( Kg.) : 30 40 50 60
10. Correlation : On the basis of
degree
Negative correlation
if one variable is increasing and with its
impact on average other variable is also
decreasing that will be positive
correlation.
For example :
Income ( Rs.) : 350 360 370 380
Weight ( Kg.) : 80 70 60 50
11. Correlation : On the basis of
number of variables
Simple correlation
Correlation is said to be simple when
only two variables are analyzed.
For example :
Correlation is said to be simple when it
is done between demand and supply
or we can say income and expenditure
etc.
12. Correlation : On the basis of
number of variables
Partial correlation :
When three or more variables are
considered for analysis but only two
influencing variables are studied and
rest influencing variables are kept
constant.
For example :
Correlation analysis is done with demand,
supply and income. Where income is
kept constant.
13. Correlation : On the basis of
number of variables
Multiple correlation :
In case of multiple correlation three or
more variables are studied
simultaneously.
For example :
Rainfall, production of rice and price of
rice are studied simultaneously will be
known are multiple correlation.
14. Correlation : On the basis of
linearity
Linear correlation :
If the change in amount of one variable
tends to make changes in amount of
other variable bearing constant
changing ratio it is said to be linear
correlation.
For example :
Income ( Rs.) : 350 360 370 380
Weight ( Kg.) : 30 40 50 60
15. Correlation : On the basis of
linearity
Non - Linear correlation :
If the change in amount of one variable
tends to make changes in amount of
other variable but not bearing constant
changing ratio it is said to be non - linear
correlation.
For example :
Income ( Rs.) : 320 360 410 490
Weight ( Kg.) : 21 33 49 56
16. 2222
)()(
YYnXXn
YXXYn
rxy
Shared variability of X and Y variables on the top
Individual variability of X and Y variables on the bottom
17. Importance of correlation
analysis :
Measures the degree of relation i.e.
whether it is positive or negative.
Estimating values of variables i.e. if
variables are highly correlated then we
can find value of variable with the help
of gives value of variable.
Helps in understanding economic
behavior.
18. Correlation and Causation
The correlation may be due to pure
chance, especially in a small sample.
Both the correlated variables may be
influenced by one or more other
variables.
Both the variables may be mutually
influencing each other so that neither an
be designed as the cause and other as
19. Probable Error :
Probable error determine the reliability of
the value of the coefficient in so far as it
depends on the conditions of random
sampling. It helps in interpreting its
value.
P.E.r = 0.6745 (1-r2)/√n
r = coefficient of correlation.
n = number of pairs of observation.
20. Conditions under Probable error :
if the value of r is less than the
probable error there is no evidence of
correlation, i.e. the value of r is not at
all significant.
If the value of r is more than six times
the probable error, the coefficient of
correlation is practically certain i.e. the
value of r is significant.
21. Conditions under Probable error
By adding and subtracting the value of
probable error from the coefficient of
correlation we get the upper and lower
limits, between correlation lies.
P = r+ P.E. ( upper limit )
P = r- P.E. ( lower limit )
22. Coefficient of Determination :
Coefficient of determination also helps in
interpreting the value of coefficient of
correlation. Square of value of correlation
is used to find out the proportionate
relationship or dependence of dependent
variable on independent variable. For e.g.
r= 0.9 then r2 = .81 or 81% dependence of
dependent variable on independent
variable.Coefficient of Determination = Explained variation
Total variance