Question: Formula 8.1 provides a method for computing the sample size required to obtain a confidence interval with a specified confidence level and margin of error.

Formula 8.1 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 you want a whole number?
b. Why do you round up instead of down?

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