Calculates the average and the variance
The function \(MeanVari\) calculates the average value and the variance of the available data.
The result is a list containing the average value and the variance in that order.
MeanVari (List) = [average, variance]
a=[4,6,9,7,9,2,4,6,3]
MeanVari(a)= 5.56 6.28