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A study was conducted to investigate drinking problems among college students. In 1983, a group of students were asked whether they had ever driven an automobile while drinking. In 1987 after the legal drinking age was raised, a different group of college students were asked the same question. The results are as follows.
Drove While Drinking
Year
Total
1983
1987
Yes
1250
991
2241
No
1387
1666
3053
2637
2657
5294
Calculate separately for 1983 and 1987, the 95% confidence interval for the proportion of students who had driven an automobile while drinking.
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