how to find the one standard deviation from the mean can some one give me the hints to explain?

Question

The given code includes a list of heights for various basketball players.
You need to calculate and output how many players are in the range of one standard deviation from the mean.

Answer 1

You nee not to find, as computer is a calculator. But I encourage you to figure out what is the meaning of standard deviations by looking at statistic book or wiki.