Výsledky vyhledávání - "Foster D McClure"

Use of Prediction Methods to Assess Laboratory Bias and Mean Values Associated with an Interlaboratory Study for Method Validation and/or Proficiency Testing

Autor: Foster D Mcclure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 97:624-629

Two methods of prediction of random variables, best predictor (BP) and best linear unbiased predictor (BLUP), are discussed as potential statistical methods to predict laboratory true mean and bias values using the sample laboratory mean (yi) from in

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8be81e086d69fba73f62bc8dbf8efd8f
https://doi.org/10.5740/jaoacint.12-457

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Variances and Uncertainties of the Sample Laboratory-to-Laboratory Variance (sL2) and Standard Deviation (sL) Associated with an Interlaboratory Study

Autor: Foster D McClure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 95:244-251

The validation process for an analytical methodusually employs an interlaboratory study conducted as a balanced completely randomized model involving a specified number of randomly chosen laboratories, each analyzing a specified number of randomly al

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c505a5e63dc132929071453fcb3dc19
https://doi.org/10.5740/jaoacint.11-031

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Determination of Operating Characteristic, Retesting, and Testing Amount Probabilities Associated with Testing for the Presence of Salmonella in Foods

Autor: Foster D McClure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 94:327-334

The relatively small perceived probability associated with retesting a food for the presence of Salmonella at low levels is often considered as one of the reasons that a confirmatory or check-analysis tends to disagree in practice with the results of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4fcc28fd3b9f44426133c5b5626db88e
https://doi.org/10.1093/jaoac/94.1.327

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Determination of a Two-Tailed 100(1-α)% Upper Limit on the Relative Error in the Laboratory-to-Laboratory Standard Deviation Obtained from an Interlaboratory Study

Autor: Jung K Lee, Foster D McClure

Publikováno v: Journal of AOAC INTERNATIONAL. 92:1593-1601

For some classes of analytical methods, it is assumed that the error in the laboratory-to-laboratory standard deviation (sL) is appreciable. To demonstrate the magnitude of this error in sL for such methods, formulas were derived to obtain a two-tail

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca567d4fd04cd00a3a4b7a2856212be7
https://doi.org/10.1093/jaoac/92.5.1593

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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

Autor: Foster D McClure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 92:320-328

Formulas, based on a normal approximation for the noncentral t-distribution, were developed to compute 100p one-tailed upper limits for future sample relative repeatability and relative reproducibility standard deviations (RSDr, and RSDR,) collaborat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::20045e29ae1ce784a0ac94a140037f15
https://doi.org/10.1093/jaoac/92.1.320

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Uncertainties of Method Performance Statistics Based on a Balanced Completely Randomized Model Interlaboratory Study

Autor: Jung K Lee, Foster D McClure

Publikováno v: Journal of AOAC INTERNATIONAL. 91:660-670

Using exact and asymptotic distributions, formulas were developed to derive population variances and uncertainties, and their corresponding unbiased estimates, for the method performance statistics, i.e., the sample mean (y_bar..), the repeatability

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44c4dae8e308d4bd7686c3d3c34b49a5
https://doi.org/10.1093/jaoac/91.3.660

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Exact One-Tailed 100p Upper Limits for Future Sample Repeatability Relative Standard Deviations Obtained in Single and Multilaboratory Repeatability Studies

Autor: Jung K Lee, Foster D McClure

Publikováno v: Journal of AOAC INTERNATIONAL. 90:1701-1705

Formulas are derived to obtain exact one-tailed 100p upper limits (p and p) for future sample repeatability relative standard deviations, based on a noncentral t-distribution, for multi- and single-laboratory repeatability studies, respectively, used

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::58ac92bf2c31580e01c0edfe7bc03231
https://doi.org/10.1093/jaoac/90.6.1701

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On Using an Approximate Noncentral t-Distribution in Determining a One-Side Upper Limit for Future Sample Relative Reproducibility Standard Deviations

Autor: Jung K Lee, Foster D McClure

Publikováno v: Journal of AOAC INTERNATIONAL. 90:575-581

For future sample relative reproducibility standard deviations (RSDR), collaboratively obtained under a completely randomized model (CRM), a new formula for determining a one-tailed 100p% upper limit (p) for such RSDR values was developed based on an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dc7bdbfa555137a217270f34ca06921d
https://doi.org/10.1093/jaoac/90.2.575

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On Determining a 1-Tailed Upper Limit for Future Sample HorRat Values

Autor: Foster D McClure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 89:1650-1663

Two formulas were developed for use in computing 1-tailed upper limits for future HorRat values obtained from the collaborative study of materials. One formula is applicable when a future sample HorRat value is computed based on a known concentration

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b7de457b94b6d7d0ee93d78bd2b81de1
https://doi.org/10.1093/jaoac/89.6.1650

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Determining a One-Tailed Upper Limit for Future Sample Relative Reproducibility Standard Deviations

Autor: Foster D McClure, Jung K Lee

Publikováno v: Journal of AOAC INTERNATIONAL. 89:797-803

A formula was developed to determine a one-tailed 100p% upper limit for future sample percent relative reproducibility standard deviations , where sR is the sample reproducibility standard deviation, which is the square root of a linear combination o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::42da71dea117c8d49c5c2f5f3df5d51f
https://doi.org/10.1093/jaoac/89.3.797

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