Use the given information:
[tex]n = 20[/tex] , ∑[tex]x = 1570[/tex] , ∑[tex]x^{2} = 125696[/tex] , minimum = 60 , maximum = 100


Find the mean [tex]x^{-}[/tex]. Round your answer to a whole number.

Find s². Round your answer to a whole number.