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If n = 10 observations are randomly sampled from a distribution with mean µ = 9 and variance σ 2 = 8, what is the mean and variance of the sample mean?

2. Suppose you randomly sample n = 12 observations from a discrete distribution with the following probability function.

X:	1	2	3	4
P(x):	.2	.1	.5	.2

Determine E(X‾) and σ²_x.

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Category:- Statistics and Probability
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