What is the variance of the data set? 8, 9, 10, 16, 17

Mean = (8 + 9 + 10 + 16 + 17) / 5 = 60/5 = 12.

x - mean:

8 - 12 = - 4, - 4² = 16

9 - 12 = - 3, - 3² = 9

10 - 12 = - 2, - 2² = 4

16 - 12 = 4, 4² = 16

17 - 12 = - 5, - 5² = 25

Sum of the squares = 16 + 9 + 4 + 16 + 25 = 70

Variance = 70/5 = 14

Variance = 14