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Use the moment generating function to calculate E(X*), for each positive integer k, if X is a normal random variable with mean 0 and variance

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Use the moment generating function to calculate E(X*), for each positive integer k, if X is a normal random variable with mean 0 and variance 02 = 4. (Write out the power series expansion for the m.g.f. and identify the moments as appropriate coefficients.)

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