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A study at a community college shows that, of the 75 randomly selected first year students,...

A study at a community college shows that, of the 75 randomly selected first year students, 23 experienced stress. Of the 81 randomly selected second year students, 38 experienced stress. (Let p1 be the proportion of first year students experienced stress and p2 the proportion of second year students experienced stress).

Find a 98% confidence interval for the difference in proportions. Round answers to two decimal places.

? < p1−p2 < ?

Math   Statistics-And-Probability   
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