Mathematical expectation of random weight-coefficient W ( i; I ) may be used as a " numerical estimation of particular index ( criterion ) q ( i ) significance ", exactness of this estimation being measured by standard deviation of the corresponding random variable.
12.
"Meaning of mathematical expectation . The expected of a discrete random variable is weighted average of all possible values of all random variable where the weights are the probabilities associated with the corresponding values . The mathematical expression for computing the exerted value of a discrete random variable X with probability mass function as; -"
