The following data values represents a population. What is the variance of the values? 6, 10, 14, 2

First we find the mean (average)

(6 + 10 + 14 + 2) / 4 = 32/4 = 8

now subtract the mean value from every data value ... and square it.

6 - 8 = - 2 ... - 2^2 = 4

10 - 8 = 2 ... 2^2 = 4

14 - 8 = 6 ... 6^2 = 36

2 - 8 = - 6 ... - 6^2 = 36

now find the mean of those numbers

(4 + 4 + 36 + 36) / 4 = 80/4 = 20 < = = ur variance