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1 jet blue airlines examined the bags of 80 passengers and


1) Jet Blue Airlines examined the bags of 80 passengers and found that 20% of the bags were overweight.

a) Based on this sample, what is the 95% confidence interval for the proportion of bags that are overweight?

b) What is the minimum sample size the airline would need to estimate with 95% confidence to obtain a margin of error of +/- 3% for this estimate of the percentage of overweight bags?

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