A grocery store chain has been tracking data on the number of shoppers that use coupons. The data shows that 71% of all shoppers

Question

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 20
15.5 to 20.5
.685 to.735
6975 to.7225

Kunduz · Accepted Answer

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