In 2004 act inc reported that 74 of 1644 randomly selected


In 2004 ACT, Inc., reported that 74% of 1644 randomly selected college freshmen returned to college the next year. Estimate the national freshman-tosophomore retention rate.

a) Verify that the conditions are met.

b) Construct a 98% confidence interval.

c) Interpret your interval.

d) Explain what 98% confidence means in this context.

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Basic Statistics: In 2004 act inc reported that 74 of 1644 randomly selected
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