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OpenStudy (anonymous):
compute the mean and variance for the sample mean X and the sample sum Sn if a random sample of size n=25 is taken from the population a) normal distribution with mean 2 and variance 9
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OpenStudy (anonymous):
so the mean for the sample mean X is 2 and variance is 9 and for the sample sum would it be mean 50 and variance 175?
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