Using the confidence interval formula for calculating sample size,the amount of variability believed to be in the population must be estimated.

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Quizplus · Accepted Answer

The calculation of sample size using the confidence interval formula requires an estimation of the population variability or standard deviation. This is necessary to determine the required sample size that will give an accurate and precise estimate of the population mean with a certain level of confidence.

Using the Confidence Interval Formula for Calculating Sample Size,the Amount