Task is to calculate sample skewness(x) by hand in Matlab to show that you understand the mathematical concept aka:
My solution was: skewness_x=((1/numel(x))*(sum((x-mean(x)).*(x-mean(x)).*(x-mean(x))))/(std(x)^3)) except this value is 3*10^-4 off the value which i get from skewness(x).
(x being a (1,300) vektor with 300 random values)
Did i make a mistake in my formula? Or does Matlab round somewhere?
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