Suppose we are interested in the behavior or sample mean age of college undergra

Question

Suppose we are interested in the behavior or sample mean age of college undergraduates, for random samples of a certain size. To draw conclusions about the center of the distribution of sample mean, which of these do we need to know (there may be more than one needed): population mean, population standard deviation, population shape, sample size? To draw conclusions about the spread of the distribution of sample mean, which of these do we need to know (there may be more than one needed): population mean, population standard deviation, population shape, sample size? To draw conclusions about the shape of the distribution of sample mean, which of these do we need to know (there may be more than one needed): population mean, population standard deviation, Population shape, sample size?

Explanation / Answer

A) the centre of the distribution of sample mean requires population mean , sample size

B)for spread and shape of distribution requires sample size, population mean,population standard deviation

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