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A random sample X1, X2, X of size n is taken from an exponential distribution with mean . Let I? be the sample mean. (a)

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A random sample X1, X2, X\" of size n is taken from an exponential distribution with mean . Let I? be the sample mean. (a) Show that J? is an unbiased estimator of ,6. (b) Show that V310?) = 32/11. (c) Based on a random sample of size n = 50, X is observed to be 12. Give an approximate 95% condence interval for

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