Test Index

Correlation and Regression

Question : 136 of 156

Marks: +1, -0

r, bxy, byx all have sign.

Solution:

Concept:

The correlation coefficient

r

and the regression coefficients

b_{xy}

and

b_{yx}

always share the same sign.

Explanation:

The sign of

r

indicates the direction of the linear relationship.

Both

b_{xy}

and

b_{yx}

have the same sign as

r

because they are derived from the covariance and variances.

Therefore, all three have the same sign.

Answer:

Same

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