An Improved Range Estimator of Sigma for Determining Sample Sizes |
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Authors: | Steven G Rhiel |
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Institution: | Department of MIS/Decision Sciences , College of Business and Public Administration Old Dominion University , 23529 , Norfolk , VA |
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Abstract: | The use of a range estimator of the population standard deviation, sigma (σ), for determining sample sizes is discussed in this study. Standardized mean ranges (dn's), when divided into the ranges of sampling frames, provide estimates of the standard deviation of the population. These estimates can be used for determining sample sizes. The dn's are provided for seven different distributions for sampling frame sizes that range from 2 to 2000, For each of the seven distributions, functional relationships are developed such that dn = f(nSF) where nSF is the size of the sample frame. From these functions, dn's can be estimated for sampling frame sizes which are not presented in the study. |
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Keywords: | range estimator of σ sample size sampling frame standardized mean range |
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