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Is it always necessary to use a large sample in a study? Reflect for a moment...

Is it always necessary to use a large sample in a study? Reflect for a moment on when a study might need to use many participants, and when a study might not need to use many participants.

Which of the four big validities does the number of participants address?

What type of design helps to minimize number of participants and how?

Math   Statistics-And-Probability   
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