Question

How do you find the variance of the data 2, 4, 6, 8, 10?

Answer 1

Variance is `8`

Explanation:

Variance `(sigma^2)` is the average of squared difference from mean.

Mean is `M= (2+4+6+8+10)/5 =30/5 =6`

Variance is `sigma^2=((2-6)^2+(4-6)^2+(6-6)^2+(8-6)^2+(10-6)^2)/5`

`= (16+4+0+16+4)/5 = 40/5 =8`

So the variance is `8` [Ans]