THINKING FAST AND SLOW - Commented Book
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The Importance of a Small Sample Size
For a research psychologist, sampling variation is not a curiosity. It is a nuisance and a costly obstacle which turns the undertaking of every research project into a gamble. Using a sufficiently large sample is the only way to reduce the risk. Researchers who pick too small a sample leave themselves at the mercy of sampling luck. No researcher in his right mind would accept such a risk.
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