2004-10-26_REVISION - M1999002

• Permit No: M1999002
• IBM Index Class Name: Revision
• Doc Date: 10/26/2004
• Doc Name: Determination of Numeric Protection Levels and Early Warning Indicators.
• From: DMG
• To: American Soda LLP
• Type & Sequence: TR4
• Media Type: D
• Archive: No

Outlier Test
Dean and Dixon
The data set containing N values is sorted either in an ascending or descending order, with x, being the suspect
value. Then the test statistic Q is calculated using the equation
i~,-~~~
The decision whether x, is an outlier is performed by comparing the value Q to the critical values listed in the
following table:
Dixon's critical value table:
N 10% 5% 2% 1% 0.5%
3 0.886 0.941 0.976 0.988 0.994
4 0.679 0.765 0.846 0.889 0.926
5 0.557 0.642 0.729 0.780 0.821
6 0.482 0.560 0.644 0.698 0.740
7 0.434 0.507 0.586 0.637 0.680
8 0.479 0.554 0.631 0.683 0.725
9 0.441 0.512 0.587 0.635 0.677
10 0.409 0.477 0.551 0.597 0.639
11 0.517 0.576 0.638 0.679 0.713
12 0.490 0.546 0.605 0.642 0.675
13 0.467 0.521 0.578 0.615 0.649
14 0.492 0.546 0.602 0.641 0.674
15 0.472 0.525 0.579 0.616 0.647
16 0.454 0.507 0.559 0.595 0.624
17 0.438 0.490 0.542 0.577 0.605
18 0.424 0.475 0.527 0.561 0.589
19 0.412 0.462 0.514 0.547 0.575
20 0.401 0.450 0.502 0.535 0.562
21 0.391 0.440 0.491 0.524 0.551
22 0.382 0.430 0.481 0.514 0.541
23 0.374 0.421 0.472 0.505 0.532
24 0.367 0.413 0.464 0.497 0.524
25 0.360 0.406 0.457 0.489 0.516