Please show work ( on notebook if possible ) for questions a and b.

(0 3) (10 points) The following information was obtained from the files on 80 families regarding the amount (in dollars) that an insurance company paid out under its dental insurance plan. (Consider Population) amount number of (dollars) families 100 5 200 16 300 20 400 28 500 7 600 (a) Find the mean amount paid out. ANS. (b) Find the standards deviation of the amount paid out. ANS