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On using a normal approximation for the noncentral t-distribution in determining upper limits for future sample relative repeatability and reproducibility standard deviations

Formulas, based on a normal approximation for the noncentral t-distribution, were developed to compute 100p% one-tailed upper limits for future...
Journal of AOAC International, 01/01/09 by Foster D. McClure · More from publication
Uncertainties of method performance statistics based on a balanced completely randomized model interlaboratory study

Using exact and asymptotic distributions, formulas were developed to derive population variances and uncertainties, and their corresponding...
Journal of AOAC International, 05/01/08 by Foster D. McClure · More from publication
Exact one-tailed 100p% upper limits for future sample repeatability relative standard deviations obtained in single-and multilaboratory repeatability studies

Formulas are derived to obtain exact one-tailed 100p% upper limits (Kp and vp) for future sample repeatability relative standard deviations, based...
Journal of AOAC International, 11/01/07 by Foster D. McClure · More from publication
On using an approximate noncentral t-distribution in determining a one-side upper limit for future sample relative reproducibility standard deviations

For future sample relative reproducibility standard deviations ([RSD.sub.R]), collaboratively obtained under a completely randomized model (CRM), a...
Journal of AOAC International, 03/01/07 by Foster D. McClure · More from publication
Statistics Committee

Committee Actions Committee Actions LaBudde, Graves, Lin, and Wehling developed the first of a planned series of Excel spreadsheets for use by...
Journal of AOAC International, 01/01/07 by Foster D. McClure · More from publication
On determining a 1-tailed upper limit for future sample HorRat values

Two formulas were developed for use in computing 1-tailed upper limits for future HorRat values obtained from the collaborative study of materials....
Journal of AOAC International, 11/01/06 by Foster D. McClure · More from publication

Determining a one-tailed upper limit for future sample relative reproducibility standard deviations

A formula was developed to determine a one-tailed 100p% upper limit for future sample percent relative reproducibility standard deviations...
Journal of AOAC International, 05/01/06 by Foster D. McClure · More from publication
Sample sizes needed for specified margins of relative error in the estimates of the repeatability and reproducibility standard deviations

Sample size formulas are developed to estimate the repeatability and reproducibility standard deviations ([S.sub.r] and [S.sub.R]) such that the...
Journal of AOAC International, 09/01/05 by Foster D. McClure · More from publication
Statistics committee

Old Business Old Business The Committee was advised that the previously defined "Old Business" items that did not receive "Action Item" status...
Journal of AOAC International, 01/01/05 by Foster D. McClure · More from publication

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