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What sample size will be needed

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Problem: A study of credit card statement revealed that on average 32% of customers only pay the minimum amount every month with a margin of error of 4%. What sample size will be needed, if we want to have a 2.5% margin or error? (All analysis is done for the 95% confidence level). Can you please help me by providing the authentic solution of this problem.

Reference no: EM132422277

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