# A) Caused by a third variableB) uncorrelated) negative effect0.fb/orrrteD) direct cause-and-effect7) The formula for the correlation coefficient r=n (Σxy)-(Σx) (Σν)means7)n(Ex2)- (Ex)2n(2y2)- (2y)DA) r is the ratio of the covariance to the product of the standard deviation of XYB) r is the ratio of the covariation to the square root of the product of the variation inX and the variation in Y.C)ris the ratio of the covariance to the square root of the product of the variation in Xand the variation in Y.D) r is the ratio of the covariation to the product of the standard deviations of X and Y.

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Step 1

The correlation coefficient formula is given by

Step 2

The correlation coefficient is determined by dividing the cova...

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