Check whether there is convincing evidence that there is a difference between the proportion of high school students and high school teachers who agree with the statement.

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Chapter 11.3, Problem 47E

To determine

Check whether there is convincing evidence that there is a difference between the proportion of high school students and high school teachers who agree with the statement.

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2.) The Gallup organization surveyed 1100 adult Americans on May 6-9, 2002, and conducted an independentsurvey of 1100 adult Americans on May 8-11, 2014. In both surveys they asked, “Right now, do you think the stateof moral values in the country as a whole is getting better or getting worse?” On May 8-11, 2014, 816 of the 1100of the survey responded that the state of moral values is getting worse; on May 6-9, 2002, 737 of 1100 surveyedresponded that the state of moral values is getting worse. Is there a significant difference between the twoproportions at the ? = 0.1 level of significance?a.) Verify that the requirements for inference about two population proportions is satisfied.b.) What is the Null and Alternative Hypotheses? What test will you be using?c.) What is the level of significance and the ?-value?

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A manufacturer of household appliances wanted to determine if there was a relationship between family size and the size of washing machine purchased. The manufacturer was preparing guidelines for sales personnel and wanted to know if the sales staff should make specific recommendations to customers. A random sample of 300 families was asked about family size and size of washing machine. For the 40 families with one or two people, 25 had an 8-pound washer, 10 had a 10-pound washer, and 5 had a 12-pound washer. The 140 families with three or four people included 37 with the 8-pound washer, 62 with the 10-pound washer, and 41 with the 12-pound washer. For the remaining 120 families with five or more people, 8 had an 8-pound washer, 53 had a 10-pound washer, and 59 had a 12-pound washer. Based on these results, what can be concluded about family size and size of washer? Construct a two-way table, state the hypothesis, compute the statistics, and state your conclusion.