#APLQuest 2015-05: Write a function that returns the population standard deviation of its numeric array right argument (see https://apl.quest/2015/5/ to test your solution and view ours).
#APLQuest 2015-05: Write a function that returns the population standard deviation of its numeric array right argument (see https://apl.quest/2015/5/ to test your solution and view ours).