PeptideMeter: difference between revisions
Diff·revision 10 → 11·06:55, 29 Dec 2024
Difference between revision 10 and revision 11 of PeptideMeter. 6 lines changed; the page grew by 516 bytes.
| Revision 10 — 11:39, 9 Dec 2024 SPPS_Sorrel (talk) copyedit 2,909 bytes +33 | Revision 11 — 06:55, 29 Dec 2024 FiveOhThreeA (talk) state the method the reporting service uses, since it is not the only one available 3,425 bytes +516 | ||
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| 22 | Sample size is the other axis. A tally of three submissions and a tally of ninety are not comparable, and ranking suppliers by mean purity without regard to submission count produces orderings driven mostly by noise. This is a general property of small-sample rankings rather than a criticism of any particular tally.{{r|iso17025}} | 22 | Sample size is the other axis. A tally of three submissions and a tally of ninety are not comparable, and ranking suppliers by mean purity without regard to submission count produces orderings driven mostly by noise. This is a general property of small-sample rankings rather than a criticism of any particular tally.{{r|iso17025}} |
| 23 | 23 | ||
| + | 24 | == Self-selection and its direction == | |
| + | 25 | Two filters operate before a result reaches a database of this kind. | |
| + | 26 | ||
| + | 27 | # ''Who tests''. Purchasers who commission independent analysis differ systematically from those who do not — they are more experienced, buy more, and often buy from suppliers they already trust. | |
| + | 28 | # ''Who submits''. A favourable result is more likely to be submitted by a satisfied purchaser than an unfavourable one is by a dissatisfied one, though the reverse also occurs when a purchaser is aggrieved. | |
| + | 29 | ||
| 24 | == References == | 30 | == References == |
| 25 | {{reflist}} | 31 | {{reflist}} |