The typical range for sample size in problem solving research,product tests and test marketing studies is 300-500 respondents.

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Quizplus · Accepted Answer

This is because a sample size of 300-500 respondents is generally considered to be large enough to provide accurate results while also being manageable in terms of gathering and analyzing data. However, the specific sample size needed may vary depending on the research question, population being studied, and other factors.

The Typical Range for Sample Size in Problem Solving Research,product