Auto-Correlation and Noise

%% TASK 1
% Generate random noise using Gaussian distribution for [10 100 1000 and
% 10000] samples and calculate mean and standard devation

%% TASK 2
% Plot Auto-correlation of all the 4 realizations and comment on your
% results

%% TASK 3
% Comment on the mean ergodicity of the signals

*Increasing number of samples in the realization shows that the signal
become more random and its Auto-correlation plot converges to its mean value