In using the "typical sample size" method of determining the size of a sample, for every major subgroup in the study you should have only 1,000 respondents.

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Quizplus · Accepted Answer

The "typical sample size" method of determining the size of a sample is based on the overall population size, margin of error, and confidence level, and does not necessarily require a set number of respondents per subgroup. The appropriate sample size for each subgroup will depend on the size of the subgroup and its importance to the study.

In Using the "Typical Sample Size" Method of Determining the Size