Question: Assume simple random sampling. Calculate the variance of the sample mean, 2x for each of the following. a. N = 1200; n = 80; s

Assume simple random sampling. Calculate the variance of the sample mean, σ2x for each of the following.
a. N = 1200; n = 80; s = 10
b. N = 1425; n = 90; s2 = 64
c. N = 3200; n = 200; s2 = 129

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