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Correlation and Regression Quiz

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Questions and Answers

What is assumed about the association between two quantitative variables in statistical terms?

The association is non-existent

The association is random

The association is linear (correct)

The association is curvilinear

When is the correlation coefficient +1?

When there is no association between two variables

When there is a curvilinear association between two variables

When there is a perfect positive linear association between two variables (correct)

When there is a perfect negative linear association between two variables

What does the correlation coefficient measure?

The direction of association between a quantitative and a categorical variable

The strength of association between two categorical variables

The variability within a single quantitative variable

The degree of linear association between two quantitative variables (correct)

What is the purpose of regression in statistical analysis?

Estimating the best straight line to summarize the association between two variables Signup and view all the answers

What does a correlation coefficient of 0 indicate?

Complete absence of correlation between two variables Signup and view all the answers

किसका संबंध सही है?

जब एक प्रारंभिक मान बढ़ता है तो संबंध सकारात्मक होता है Signup and view all the answers

कोरलेशन संबंध संख्या क्या मापता है?

दो चर संबंध की व्यापकता को Signup and view all the answers

कोरलेशन संबंध संख्या का 0 होना क्या सूचित करता है?

संबंध की अनुपस्थिति Signup and view all the answers

कोरलेशन संबंध संख्या की स्केल क्या होती है?

-1 से 1 तक Signup and view all the answers

जब एक प्रारंभिक मान घटता है तो संबंध कैसा होता है?

नकारात्मक Signup and view all the answers

Study Notes

Correlation and Regression

Correlation is used to denote an association between two quantitative variables, assuming a linear relationship, where one variable increases or decreases by a fixed amount for a unit increase or decrease in the other.
In everyday life, correlation is used to describe an association, such as the connection between foggy days and attacks of wheeziness.
Regression involves estimating the best straight line to summarize the association between two variables.

Correlation Coefficient

The correlation coefficient, denoted by r, measures the degree of association between two variables.
The correlation coefficient is sometimes called Pearson's correlation coefficient after its originator.
It is a measure of linear association between two variables.

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Description

Test your knowledge of correlation and regression with this quiz. Explore the concepts of association, statistical correlation, and regression analysis. Assess your understanding of these statistical methods and their application in research and data analysis.