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The College Board American College Testing Program reported a population mean Sat score of (funny looking) u-1020. Assume that the population standard deviation is funny looking o with line top right = 100,
a) What is the probability that a random sample of 75 students will provide a sample mean score within 20 of the population mean?
b) What is the probability a random sample of 75 students will provide a sample mean Sat score within 20 of the population mean?
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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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