+128475 6 8 1 9 4
First find the mean = [ 6 + 8 + 1 + 9 + 4 ] / 5 = 28 / 5
Take the sum of the squared differences from each data value and the mean and take the average of these
So we have
[(6 - 28/5)^2 + ( 8 - 28/5)^2 + (1 - 28/5)^2 + (9 - 28/5)^2 + (4 - 28/5)^2 ] / 5 =
206 /25 =
8.24 = the variance
