Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two

Determine the minimum sample size required when you want to be 98% confident that the sample mean is within two

units of the population mean. Assume a standard deviation of 5.75 in a normally distributed population.

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 Determine the minimum sample size required when you want to be 80% confident that the sample mean is within 1.3 units of the population mean. Assume a standard deviation of 9.24 in a normally distributed population.

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