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Questions and Answers
What is assumed about the association between two quantitative variables in statistical terms?
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 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?
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?
What is the purpose of regression in statistical analysis?
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What does a correlation coefficient of 0 indicate?
What does a correlation coefficient of 0 indicate?
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किसका संबंध सही है?
किसका संबंध सही है?
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कोरलेशन संबंध संख्या क्या मापता है?
कोरलेशन संबंध संख्या क्या मापता है?
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कोरलेशन संबंध संख्या का 0 होना क्या सूचित करता है?
कोरलेशन संबंध संख्या का 0 होना क्या सूचित करता है?
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कोरलेशन संबंध संख्या की स्केल क्या होती है?
कोरलेशन संबंध संख्या की स्केल क्या होती है?
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जब एक प्रारंभिक मान घटता है तो संबंध कैसा होता है?
जब एक प्रारंभिक मान घटता है तो संबंध कैसा होता है?
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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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