A sample of 1 200 individuals arrested for driving under the
A sample of 1,200 individuals arrested for driving under the influence of alcohol was ­obtained from police records. The research recorded the gender, socioeconomic status (from ­occupation information), and number of previous alcohol- related arrests. These data are shown here:
Separately for each socioeconomic status group, answer the following questions.
a. Is there significant evidence of a difference between males and females with ­respect to the number of previous alcohol- related arrests?
b. Compute the odds of having a previous alcohol- related arrest for both males and females. Interpret these values.
c. Compute the odds ratio of having a previous alcohol- related arrest for males vesus females, and place a 95% confidence interval on the odds ratio. Interpret the interval.
d. Compare the results for the three socioeconomic statuses.
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