Question: 4. Write a MATLAB function that calculates the standard deviation of an array. stddev = Xi n i=1 (x,- mean) n-1 i-th element of

4. Write a MATLAB function that calculates the standard deviation of an array. stddev = Xi n i=1 (x,- mean) n-1 i-th element of the array the length of the array mean the average of the array elements

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