Slot machines are the favorite game at casinos throughout theUnited States (Harrah’s Survey 2002: Profile of the AmericanGambler). A local casino wants to estimate the difference in thepercent of women and me who prefer the slots with a 95% level ofconfidence. Random samples of 320 women and 250 men found that 256women prefer slots and 165 men prefer slots.

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-Hypothesis test for one population mean (unknown populationstandard deviation)

2-Confidence interval estimate for one population mean (unknownpopulation standard deviation)

3-Hypothesis test for population mean from paireddifferences

4-Confidence interval estimate for population mean from paireddifferences

5-Hypothesis test for difference in population means from twoindependent samples

6-Confidence interval estimate for difference in populationmeans from two independent samples

7-Hypothesis test for one population proportion

8-Confidence interval estimate for one population proportion

9-Hypothesis test for difference between two populationproportions

10-Confidence interval estimate for difference between twopopulation proportions

The National Endowment for the Humanities sponsors summerinstitutes to improve the skills of high school language teachers.One institute hosted 20 French teachers for four weeks. At thebeginning of the period, the teachers took the Modern LanguageAssociation's listening test of understanding of spoken French.After four weeks of immersion in French in and out of class, theytook the listening test again. (The actual spoken French in the twotests was different, so that simply taking the first test shouldnot improve the score on the second test.) The Director of thesummer institute would like to estimate the change (and hopefulimprovement) in the teachers' skills after participating in theclass.

1-

-Hypothesis test for one population mean (unknown populationstandard deviation)

2-Confidence interval estimate for one population mean (unknownpopulation standard deviation)

3-Hypothesis test for population mean from paireddifferences

4-Confidence interval estimate for population mean from paireddifferences

5-Hypothesis test for difference in population means from twoindependent samples

6-Confidence interval estimate for difference in populationmeans from two independent samples

7-Hypothesis test for one population proportion

8-Confidence interval estimate for one population proportion

9-Hypothesis test for difference between two populationproportions

10-Confidence interval estimate for difference between twopopulation proportions