Correlation And Regression

The slope of the regression line of Y on X is also called the:

• Correlation coefficient of X on Y

• Correlation coefficient of Y on X

• Regression coefficient of X on Y

• Regression coefficient of Y on X

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If one regression coefficient is greater than one, then other will be:

• More than one

• Equal to one

• Less than one

• Equal to minus one

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The regression equation always passes through:

• (X, Y)

• (a, b)

• (X̅ ,ȳ)

• (X̅, Y)

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The correlation coefficient is the ________ of two regression coefficients:

• Geometric mean

• Arithmetic mean

• Harmonic mean

• Median

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When two regression coefficients bear same algebraic signs, then correlation coefficient is:

• Positive

• Negative

• According to two signs

• Zero

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The value of the coefficient of correlation r lies between:

• 0 and 1

• -1 and 0

• -1 and +1

• -0.5 and +0.5

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Rank correlation coefficient was discovered by

• Fisher

• Spearman

• Karl Pearson

• Bowley

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If the regression line is X on Y, then the variable X is known as

• a)Dependent variable

• b)Explained variable

• Both a and b

• Regressor

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If the correlation coefficient between two variables, X and Y, is negative, then the regression coefficient of Y on X is

• Positive

• Negative

• Not certain

• None of these

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 $If\ b_{yx}=-2\ and\ r=-1\ then\ b_{xy}\ is?$  

• -1

• -2

• 0.5

• -0.5

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