Standard Deviation

Question

A random variable is normally distributed with the mean 26.2 and a standard deviation 19.6. what value is 2 standard deviations below the mean?

Answer 1

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

For this problem that would be 26.2 +/- 2*19.6

Which is 26.2 - 39.2 and 26.2 + 39.2.

Which is -12.7, 65.7