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Skewness is a measure of the extent to which the probability distribution of a random variable lies more to one side of the mean, as opposed to it being exactly symmetrical.If μ and s are the mean and standard deviation of a random variable X, thenSkew(X) = Expected value of [(X - μ)/s]3
skewness
It is a measure of the spread of the variable. Also, in conjunction with the median, it gives a measure of the skewness.
if coefficient of skewness is zero then distribution is symmetric or zero skewed.
distinguish between dispersion and skewness