a) Suppose that a random variable Xt satisfies Xt N (0,2). Use (B1.4) to show E(X4
Question:
a) Suppose that a random variable Xt satisfies Xt ∼ N (0,σ2). Use (B1.4)
to show E(X4 t )=3σ4 .
b) Apply
a) to show the assertion in Lemma 1.9,
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