i) Show that the standard score of the sample mean X, is equal to Y. ii) Show that the mean and variance of the random variable Y are 0 and 1, respectively. iii) Show using the moment generating function technique that Y is a standard normal random variable.

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Let X₁, X₂, X3,..., Xn be a random sample of size n from population X. Suppose that X~N(0, 1)
=1 X-√n.
√n
and Y =
i) Show that the standard score of the sample mean X, is equal to Y.
ii) Show that the mean and variance of the random variable Y are 0 and 1, respectively.
iii) Show using the moment generating function technique that Y is a standard normal random
variable.
Transcribed Image Text:Let X₁, X₂, X3,..., Xn be a random sample of size n from population X. Suppose that X~N(0, 1) =1 X-√n. √n and Y = i) Show that the standard score of the sample mean X, is equal to Y. ii) Show that the mean and variance of the random variable Y are 0 and 1, respectively. iii) Show using the moment generating function technique that Y is a standard normal random variable.
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