For the data set 6, 5, 10, 11, 13, the mean, x, is 9. What is the standard
deviation?
The formula for the sample standard deviation is s =
2(x - 7)?.
Use the table to help you.

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same