Question: Suppose X has density function x 2/3 /21 for 1 < x < 8 and 0 otherwise. Find (a) E X, (b) E (X 2

Suppose X has density function x−2/3/21 for 1 < x < 8 and 0 otherwise. Find

(a) E X,

(b) E (X2),

(c) Var (X).

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