Question

Suppose you have a set of data points with a correlation of 0.85. What is the variance? A. Variance = √ r = 0.92195 B. Variance = r2 = 0.7225 C. Variance = 2r2 = 1.445 D. Variance = r⁄2 = 0.425

Answer 1

B. Variance = r2 = 0.7225

Explanation:

Given the correlation coefficient, variance is obtained by squaring the correlation coefficient to obtain what is also know as coefficient of determination. Gives information on the predictive power of the model