SUPPLEMENTARY EXERCISES for ... - WH Freeman

Section 4 27A. Should laws be passed to eliminate all possibilities of special interests givinghuge sums of money to candidates?B. Should laws be passed to prohibit interest groups from contributing to campaigns,or do groups have a right to contribute to the candidates they support?One of these questions drew 40% favoring banning contributions; the other drew 80% with thisopinion. Which question produced the 40% and which got 80%? Explain why the results wereso different. (W. Mitofsky, “Mr. Perot, you’re no pollster,” New York Times, March 27, 1993.)S3.31 A university’s financial aid office wants to know how much it can expect students to earnfrom summer employment. This information will be used to set the level of financial aid. Thepopulation contains 3478 students who have completed at least one year of study but have notyet graduated. A questionnaire will be sent to an SRS of 100 of these students, drawn from analphabetized list.(a) Describe how you will label the students in order to select the sample.(b) Use Table B, beginning at line 105, to select the first five students in the sample.S3.32 A labor organization wants to study the attitudes of college faculty members towardcollective bargaining. These attitudes appear to be different depending on the type of college.The American Association of University Professors classifies colleges as follows:Class I:Offer doctorate degrees and award at least 15 per year.Class IIA: Award degrees above the bachelor’s but are not in Class I.Class IIB: Award no degrees beyond the bachelor’s.Class III: Two-year colleges.Discuss the design of a sample of faculty from colleges in your state, with total sample size about200.S3.33 You are on the staff of a member of Congress who is considering a controversial billthat would provide for government-sponsored insurance to cover care in nursing homes. Youreport that 1128 letters dealing with the issue have been received, of which 871 oppose thelegislation. “I’m surprised that most of my constituents oppose the bill. I thought it wouldbe quite popular,” says the congresswoman. Are you convinced that a majority of the votersoppose the bill? State briefly how you would explain the statistical issue to the congresswoman.Section 4S3.34 The Bureau of Labor Statistics announces that last month it interviewed all members ofthe labor force in a sample of 60,000 households; 6.2% of the people interviewed were unemployed.Is the bold number a parameter or a statistic?S3.35 A researcher investigating the effects of a toxic compound in food conducts a randomizedcomparative experiment with young male white rats. A control group is fed a normal diet,