If the standard deviations of X and Y are 15.5 and 10.8,respectively,and the covariance of X and Y is 128.8,then the correlation coefficient is approximately 0.77.

Question

Quizplus · Accepted Answer

The correlation coefficient (r) is calculated using the formula r = covariance(X, Y) / (σX * σY), where σX and σY are the standard deviations of X and Y, respectively. Substituting the given values, r = 128.8 / (15.5 * 10.8) ≈ 0.77.

If the Standard Deviations of X and Y Are 15