Fifteen randomly selected college students were asked to state the number of hours they slept the previous night. 8, 8, 10, 7, 12, 5, 12, 9, 11, 4, 11, 5, 7, 12, 4 (a) Find the variance, using graphing calculator.
Go online and you will find a statstics calculator that will give you what you want here:
https://www.easycalculation.com/statistics/standard-deviation.php
Good luck.
