Question: 14. Using each of the following random samples, determine the 95% and 99% confi dence intervals for the population mean: a. Xobt 25, s

14. Using each of the following random samples, determine the 95% and 99% confi dence intervals for the population mean:

a. Xobt  25, s  6, N  15

b. Xobt  120, s  8, N  30

c. Xobt  30.6, s  5.5, N  24

d. Redo part a with N  30. What happens to the confi dence interval as N increases? other

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