The arithmetic mean and standard deviation of a certain normal distribution are 5 and 5 respectively. What value is exactly 2 standard deviations less than the mean?

The arithmetic mean and standard deviation of a certain normal distribution are 5 and 5 respectively. What value is exactly 2 standard deviations less than the mean?

A 10.5

B 11.0

C 11.5

D 12.0

Solution

Correct Answer: Option A