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A grocery store chain has been tracking data on the number of shoppers that use...

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A grocery store chain has been tracking data on the number of shoppers that use coupons. The data shows that 71% of all shoppers use coupons. 36 times out of 40 these results were considered accurate to within 2.5%.What is the confidence interval?16 to 2015.5 to 20.5.685 to.7356975 to.7225

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