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Discuss about the true national retention rate

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Reference no: EM131649113

Question: Back to campus again. In 2004 ACT, Inc., reported that 74% of 1644 randomly selected college freshmen returned to college the next year. The study was stratified by type of college-public or private. The retention rates were 71.9% among 505 students enrolled in public colleges and 74.9% among 1139 students enrolled in private colleges.

a) Will the 95% confidence interval for the true national retention rate in private colleges be wider or narrower than the 95% confidence interval for the retention rate in public colleges? Explain.

b) Do you expect the margin of error for the overall retention rate to be larger or smaller? Explain.

Reference no: EM131649113

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