quiz2a_soln08

quiz2a_soln08 - ANS: d 3. A study was conducted to assess...

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MA 2611 D’ 08 Quiz 2a Solution Name: Section: Below are the descriptions of four studies. Identify as precisely as possible the kind of study each is. 1. A researcher studied the medical records of 500 patients. For each patient, he recorded whether the person took aspirin every day and if the person had ever had a heart attack. Then he compared the percentage of heart attacks for the patients who took aspirin every day and for those who did not take aspirin every day. (a) Controlled experiment (b) Cohort study (c) Case-referent study (d) Sample survey (e) None of a-d ANS: b 2. A soap manufacturer weighed every 100th bar of soap produced in order to estimate the proportion of bars that fall outside weight specifications. (a) Controlled experiment (b) Cohort study (c) Case-referent study (d) Sample survey (e) None of a-d
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Unformatted text preview: ANS: d 3. A study was conducted to assess whether daughters of mothers who smoked during their childhoods are themselves more likely to smoke. The study obtained a sample of female smokers and a comparison sample of nonsmokers. The proportions of women whose mothers had smoked during their childhoods were compared for the two groups. (a) Controlled experiment (b) Cohort study (c) Case-referent study (d) Sample survey (e) None of a-d ANS: c 4. In order to assess levels of industrial production, the Commerce Department obtains production gures from a repre-sentative group of industrial rms. (a) Controlled experiment (b) Cohort study (c) Case-referent study (d) Sample survey (e) None of a-d ANS: d...
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This homework help was uploaded on 04/09/2008 for the course MA 2611 taught by Professor Petrucelli during the Spring '08 term at WPI.

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