# Answer to Question #43332 in Statistics and Probability for andy

Question #43332

X_1,X_2,… X_121 are independent and identically distributed random variables such that E(X_i ) = 3 and Var (X_i ) = 25. What is the standard deviation of their average? In other words, what is the standard deviation of X = (X_1 + X_2 + … + X_121) / 121?

Expert's answer

Need a fast expert's response?

Submit orderand get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

## Comments

## Leave a comment