In a sample of 100 store customers, 43 used a MasterCard. In another sample of 100, 58 used a Visa c


Question: In a sample of 100 store customers, 43 used a MasterCard. In another sample of 100, 58 used a Visa card. At a = 0.05, is there a difference in the proportion of people who use each type of credit card?

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