Question 3 Suppose that Z₁, Z2,..., Zn are statistically independent random variables. Define Y as the sum of squares of these random variables: (L) Y = w w for th i=1 (a) Express the moment generating function My (t) of the random variable Y in tern of moment generating functions involving the random variables Z, i = 1,..., n. Z² (n ≥ 2) 72 NO 1

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