Question

What is the variance of {3,6,7,8,9}?

Answer 1

variance of `{3, 6, 7, 8, 9} = 5.3`

Explanation:

The formula for variance, `s^2`, is
`color(white)("XXX")s^2 =(sum(x_i - barx))/(n-1)`

where `barx` is the mean of the sample set
`color(white)("XXX")`in this case the mean of `{3,6,7,8,9}` is `(sumx_i)/5=6.6`