Question

Coefficient of correlation between the variables x & y is 0.8 & their covariance is 20, the variance of x is16, Standard deviation of y is

6.75 6.25 7.5 8.25

Answer 1

Answer:

6.25

Step-by-step explanation:

r= covariance /sd of x .sd of y

0.8= 20/4×sdy

=6.25