![]() Both undersized and oversized studies waste time, energy, and money the former by using resources without finding results, and the latter by using more resources than necessary. Why? Undersized studies can’t find real results, and oversized studies find even insubstantial ones. But all studies are well served by estimates of sample size, as it can save a great deal on resources. Nearly all granting agencies require an estimate of an adequate sample size to detect the effects hypothesized in the study.
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