Help me find the sample variance of 5, 12, 13?

Question

Calculate the sample variance, s2, of the set of numbers.

(5, 12, 13)

Enter all eight responses as integers.

Answer 1

First find the mean: 5 + 12 + 13 = 30/3 = 10

value (value - mean)^2

5 25

12 4

13 9

sum 38

variance = sum/sample size (3) - 1 = 38/2 = 19