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Questions and Answers
What is the meaning of perfect correlation?
What is the meaning of perfect correlation?
- Correlation coefficient is 0
- Correlation coefficient is undefined
- Correlation coefficient is -1
- Correlation coefficient is 1 (correct)
When two variables move in the opposite direction, what is the nature of the correlation of two variables?
When two variables move in the opposite direction, what is the nature of the correlation of two variables?
- Perfect correlation
- Positive correlation
- Negative correlation (correct)
- No correlation
Define Simple, Multiple and Partial correlation.
Define Simple, Multiple and Partial correlation.
- Simple: Relationship between more than two variables; Multiple: Relationship between two variables; Partial: Relationship between multiple variables without controlling for other variables
- Simple: Relationship between two variables; Multiple: Relationship between more than two variables; Partial: Relationship between multiple variables with controlling for other variables
- Simple: Relationship between two variables; Multiple: Relationship between more than two variables; Partial: Relationship between multiple variables while controlling for other variables (correct)
- Simple: Relationship between two variables; Multiple: Relationship between more than two variables; Partial: Relationship between multiple variables without controlling for other variables
Define Regression.
Define Regression.
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$b_{xy} = 0.32$, if $r = 0.8$, what will be the value of $b_{yx}$?
$b_{xy} = 0.32$, if $r = 0.8$, what will be the value of $b_{yx}$?
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Define correlation. Write its types also.
Define correlation. Write its types also.
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Define the term positive correlation.
Define the term positive correlation.
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What is a linear correlation.
What is a linear correlation.
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Define Regression.
Define Regression.
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If the coefficient of correlation between two variables $x$ and $y$ is 0.64, their covariance is 16, and the variance of $x$ is 19, find the standard deviation of the $y$ series.
If the coefficient of correlation between two variables $x$ and $y$ is 0.64, their covariance is 16, and the variance of $x$ is 19, find the standard deviation of the $y$ series.
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