1950•Journal of the American Statistical AssociationRequires access

Sample Size Required for Estimating the Standard Deviation as a Per Cent of its True Value

Joseph A. Greenwood, Marion M. Sandomire

Abstract

One frequently encounters the need of a rational selection of sample size when it is desired to estimate the standard deviation. Changing the permissible error of the estimate from an absolute to a relative one is acceptable in many cases and permits an exact, a priori solution to the problem of sample size without involving any previous estimates.

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Key concepts: Statistics, Standard deviation, Sample size determination, Mathematics, Sample (material), Value (mathematics), Standard error, A priori and a posteriori