Implement MATLAB code that calculates the following formula. Use your

student ID as eight $1$ digit data to be used for your calculation. $($ : average$)$

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

Compare the result from your code with the result produced by MATLAB

function $"$ var$(x)",$ where $x$ contains the data.

Hypothesize the reason why they are different.

Modify your code $($not MATLAB $"$ var$(x)")$ and show the correctness of your

hypothesis.