Question

Suppose E(X) = 5 and EIX(X-1)] = 27.5. What is

a. E(X)? [Hint: E[X(X - 1)] = E[X² - X] =

E(X²) - E(X)]?

b. V(X)?

c. The general relationship among the quantities E(X), EIX(X-1)], and V(X)?

Answer 1

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