What is the mean and standard deviation of the sample mean

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A population has a mean age of 45 years with a standard deviation of 3 years. If a random sample of 64 is drawn from this population, then answer the following questions:

a) What is the mean and standard deviation of the sample mean? Show formula(s) / your work.

b) What is the probability that the sample mean is greater than 45.3 years? Use the standardization method to answer this part. Show the Excel formula(s)/function(s) and values entered that you used to answer this question.

c) Answer part c) by using the direct method in Excel. Show the Excel formula(s)/function(s) and values entered that you used to answer this question.

Reference no: EM132241476

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