Question: Formula 8.2 on page 366 provides a method for computing the sample size required to obtain a confidence interval with a specified confidence level and

Formula 8.2 on page 366 provides a method for computing the sample size required to obtain a confidence interval with a specified confidence level and margin of error. The number resulting from the formula should be rounded up to the nearest whole number.

a. Why do we want a whole number?

b. Why do we round up instead of down?

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