2.1. Let Y1, Y2, ., Y4 be a random sample of size 4 from an exponential with parameters and ß = 2. 2.1.1. Use the mgf to derive the probability distribution of the sample mean Y.

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A: Population is a pool of individuals from which a sample is drawn for a study.

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A: As per bartleby guideline expert have to answer first three subparts only.