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[6 pts] ACT, Inc. reported that 74% of 1644 randomly selected college freshmen returned to...

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[6 pts] ACT, Inc. reported that 74% of 1644 randomly selected college freshmen returned to college the next year.a. Construct and interpret a 90% confidence interval to estimate the retention rate for college freshmen.b. They want a margin of error of 1%. How many college freshmen must be surveyed?

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