Correction
for
Greenhalgh, BMJ 315 (7104) 364-366.
BMJ 1997;315:675 (13 September)
2 test is listed as a parametric test. In
fact,
both the 2 test and Fisher's exact test are
non-parametric.
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Correction
Statistics for the non-statistician. I: Different types of data need different tests
An author's error appeared in this article by Trisha Greenhalgh (9 August, pp 364-6). In table 1, the2 test is listed as a parametric test. In
fact,
both the 2 test and Fisher's exact test are
non-parametric.
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