A population variable has a distribution with a mean of $\mu$= 50 and a variance of $\sigma$² = 225.From this population a simple random sample of n observations is to be selected and the mean of the sample values calculated.How big must the sample size n be so that the standard deviation of the sample mean is equal to 1.4 (i.e. , = 1.4)? A)n = 11 B)n = 161 C)n = 115 D)n = 36 E)n = 21

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The Answer of A population variable has a distribution with a mean of $\mu$= 50 and a variance of $\sigma$² = 225.From this population a simple random sample of n observations is to be selected and the mean of the sample values calculated.How big must the sample size n be so that the standard deviation of the sample mean is equal to 1.4 (i.e. , = 1.4)? A)n = 11 B)n = 161 C)n = 115 D)n = 36 E)n = 21

A Population Variable Has a Distribution with a Mean Of \mu