d. Several years ago, a state reinstituted the death penalty for first-degree homicide. Did this reduce the homicide rate? A researcher has gathered infor- mation on the number of homicides in the state for the two-year periods before and after the change. e. A local automobile dealer is concerned about cus- tomer satisfaction. He mails a survey form to all customers for the past year and asks whether they are satisfied, very satisfied, or not satisfied with their purchases.
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- The question asks whether the reinstitution of the death penalty for first-degree homicide reduced the homicide rate. - The researcher has data on the number of homicides in the state for two-year periods before and after the change. Show more…
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Adi S.
Statistics in the Media In May $2002,71 \%$ (0.71) of Americans favored the death penalty for a person convicted of murder. In May 2005,1005 adult Americans were asked by the Gallup Organization, "Are you in favor of the death penalty for a person convicted of murder?" Of the 1005 adults surveyed, 744 responded yes. The headline in the article reporting the survey results stated, "Americans' Views of Death Penalty More Positive This Year." Use a test of significance to support or refute this headline.
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Suppose a researcher wanted to study support for the death penalty by people based on their education. Education is measured by a survey question asking whether or not they have a college degree (yes or no). Death penalty was measured by a survey question asking yes or no. What statistical test is most appropriate to this data? Select one: a. t - test b. ANOVA c. z - test d. cannot be determined
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