Standard Deviation

Question

A random variable is normally distributed with mean 96.1 and a standard deviation of 7.9. what value is 2 standard deviations about the mean

Answer 1

Two standard deviations about the mean is the mean +/- 2 standard deviations.

For this problem that would be 96.1 +/- 2*7.9

Which is 96.1 - 15.8 and 96.1 + 15.8.

Which is 80.3, 111.9