With this website, we provide some statistical programs for the evaluation of specific test methods / procedures.
These programs are provided freely in the hope that they are useful, but without any warranty.
The programs are made available as online calculators (access via the top-menu or the following table) and as Excel-files (download via the table).
General information for the use of the calculators is available via the bottom menu, see General . Specific information on the calculators, e.g. on the design of the experiment, the equations used, revisions etc., is available via the bottom menu as soon as you navigate to one of the online calculators.
| Program | Subject | Online | Download |
|---|---|---|---|
| BST |
Design and evaluation of Binary Sensitivity Tests according to C. Wilrich & P.-Th. Wilrich in: Materials Testing (2024), 66(11), 1931‑1944. DOI: 10.1515/mt-2024-0176, see www.researchgate.net/384692608. |
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| MPN |
Derivation of Most Probable Numbers, their standard deviations, confidence bounds and rarity values according to B. Jarvis, C. Wilrich & P.-Th. Wilrich in: Journal of Applied Microbiology (2010), 109(5), 1660‑1667. DOI: 10.1111/j.1365-2672.2010.04792.x, see www.researchgate.net/45093721. Publication and program are referenced in ISO 7218. |
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| PODLOD |
Estimation of the POD function and the LOD of a qualitative microbiological measurement method according to C. Wilrich and P.-Th. Wilrich in: Journal of AOAC International (2009), 92(6), 1763‑1772. DOI: 10.1093/jaoac/92.6.1763, see www.researchgate.net/41485250. The publication is referenced in ISO 16140-2. |
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| PODLOD- interlab (PLI) |
Estimation of the POD function and the LOD of a binary microbiological measurement method from an interlaboratory experiment
according to B. Jarvis, C. Wilrich & P.-Th. Wilrich in: Journal of AOAC International (2019), 102(5), 1617‑1623. DOI: 10.1093/jaoac/102.5.1617, see www.researchgate.net/333264572. |
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| RLOD |
Determination of the Relative Level of Detection of two qualitative microbiological measurement methods according to I. Margaritescu & P.-Th. Wilrich in: Journal of AOAC International (2013), 96(5), 1086‑1091. DOI: 10.5740/jaoacint.12-377, see also www.researchgate.net/258956385. The publication is referenced in ISO 16140-2. |
under develop- ment |
If you have questions or suggestions for the programs or found a bug, please e-mail to news@statistics-wilrich.info.
In case you would like to be notified when the programs have been updated or when new programs are provided, please send an e-mail with the subject 'Newsletter' to news@statistics-wilrich.info. The notifications are dedicated to inform about such revisions and thus will be sent very infrequently.