THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Let X be a continuous random variable with mean of 1200 and standard deviation of 250.Define the random variable Y as follows: Y = 80 + 0.05X
-What is the standard deviation of Y?
A)92.5
B)55.9
C)12.5
D)11.89

Question

Quizplus · Accepted Answer

The standard deviation of Y is calculated by multiplying the standard deviation of X by the coefficient of X in the equation for Y, which is 0.05. Thus, 0.05 * 250 = 12.5.