For the question about e-mail in the previous exercise, suppose seven females in the GSS sample of age at least 80 had the responses
0, 0, 1, 2, 5, 7, 14,
a. Using software or a calculator, find the sample mean and standard deviation and the standard error of the sample mean.
b. Find and interpret a 90% confidence interval for the population mean.
c. Explain why the population distribution may be skewed right. If this is the case, is the interval you obtained in part b useless, or is it still valid? Explain.

  • CreatedSeptember 11, 2015
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