Question

In the data set below, what is the variance?

1, 6, 7, 2, 9
If the answer is a decimal, round it to the nearest tenth.

Answer 1

Explanation:

First the mean= (1+6+7+2+9)/5=25/5=5

The Variance is taking the difference by subtracting , square it, and then average the result:

1-5=-4 -4²=16

6-5=1 1²=1

7-5=2 2²=4

2-5=-3 3²=9

9-5=4 4²=16

Total: 16+1+4+9+16=46

Variance= 46/5=9.2