Question: Let x1, . . . , xn be distinct numbers. Let Y be a discrete random variable with the following p.f.: Prove that Var(Y is

Let x1, . . . , xn be distinct numbers. Let Y be a discrete random variable with the following p.f.:
Let x1, . . . , xn be distinct numbers.

Prove that Var(Y is given by Eq. (7.5.5).

0 otherwise.

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