Optimum Sample Size and Comments on Some Published Formulae

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Abstract
Estimation of field population parameters is an indispensable part of many ecological and various pest management projects. Obviously, the greater the sample size, the more reliable the estimates are. However, the cost per unit sampled is often substantial, which makes the collection of unnecessarily large samples unwise. Thus, we must determine in advance the smallest sample size that would assure us the desired reliability of the estimate. This is called the optimum sample size. The formula giving it depends on the way we choose to define “reliability.“.

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