(Answered) What is the sample size for studies with moe of -35 and -28

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What is the sample size for studies with MOE of +/-3.5% and +/-2.8%, with a confidence level of 95%, sample statistics of 50. Suppose the category population was 7500 (less than 10,000)? Remember the FPC. What would be the sample sizes then? Please show work.

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