In words,how would you find the standard deviation of the difference between two independent random variables?
A)It is the difference between the two standard deviations.
B)It is the square root of the difference between the two variances.
C)It is the sum of the two standard deviations.
D)It is the square root of the sum of the variances.
E)It is the square root of the sum of the standard deviations.

Question

Quizplus · Accepted Answer

The formula for the standard deviation of the difference between two independent random variables is the square root of the sum of their variances. This can be written as σdiff = √(σX^2 + σY^2), where σX and σY are the standard deviations of the two random variables X and Y, respectively.

In Words,how Would You Find the Standard Deviation of the Difference