# Question

An associate dean of a university wishes to compare the mean on the standardized final exams in microeconomics and macroeconomics. He has access to a random sample of 40 scores from each of these two courses. A portion of the data is shown below; the complete data set, labeled Economics, can be found on the text website.

Micro Macro

85......... 48

78......... 79

: ......... :

75......... 74

a. Use Excel to construct 95% confidence intervals for the mean score in microeconomics and the mean score in macroeconomics.

b. Explain why the widths of the two intervals are different.

Micro Macro

85......... 48

78......... 79

: ......... :

75......... 74

a. Use Excel to construct 95% confidence intervals for the mean score in microeconomics and the mean score in macroeconomics.

b. Explain why the widths of the two intervals are different.

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