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(22.15) The proportion of drivers who use seat belts depends on characteristics such as age, sex, and ethnicity. As part of a broader study, investigators

(22.15) The proportion of drivers who use seat belts depends on characteristics such as age, sex, and ethnicity. As part of a broader study, investigators observed a random sample of 117 female Hispanic drivers in Boston. Suppose that in fact 60% of all female Hispanic drivers in the Boston area wear seat belts. In repeated samples, the sample proportionwould follow approximately a Normal distribution with mean

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