Create confidence interval for difference in proportions

Reference no: EM13121547

A survey of randomly selected college students found that 58 of the 90 freshmen and 61 of the 125 sophomores surveyed had purchased used textbooks in the past year. Construct a 99% confidence interval for the difference in the proportions of college freshmen and sophomores who purchased used textbooks.

Reference no: EM13121547

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