LAB EXERCISES

Write a function "AvgVar" using M$-$File to compute the average $\stackrel{}{x}$ and the variance of an array $x.$ The function should take an array and return the average and the variance. The variance ${}^2$ is defined as:

${}^2=\frac{1}{N-1}{\displaystyle \underset{i=1}{\overset{N}{}}}(x_i-(\stackrel{}{x}){)}^2$

$>>[Avg,$Var$]=$AvgVar$(x),\%x$ is the input vector, Avg and Var are the average and variance of the elements in $x.$