A researcher can calculate sample size using either a percentage or a mean.

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A researcher can calculate sample size using either a percentage or a mean. For example, in a survey or study, the researcher may want to estimate the percentage of people who are in favor of a particular policy, or they may want to estimate the average amount of time that people spend on a certain activity. In either case, they can use statistical methods to calculate the sample size needed to achieve a desired level of precision and confidence in the results.

A Researcher Can Calculate Sample Size Using Either a Percentage