Timeline for Chi-square test for equality of distributions: how many zeroes does it tolerate?
Current License: CC BY-SA 2.5
10 events
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| Oct 28, 2010 at 13:00 | history | edited | onestop | CC BY-SA 2.5 |
reorder R bit and fix misplaced closing quote. Give default value of workspace option for completeness.
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| Oct 28, 2010 at 4:07 | comment | added | onestop | @Membran # 1: It is a slightly different question as Fisher's exact test conditions on both sets of marginal totals. This seems something of an academic statistical nicety to me though, and I'm a statistician in academia. (BTW could you clarify to which wiki you refer?) @Membran #2: I would not call the conditional exact test "Fisher's exact test" in the case of a one-way table, but such a test should be possible.and I would have thought more straightforward for one-way tables, but I can't currently find software to assist and I don't have time to perform the calculation without. | |
| Oct 27, 2010 at 22:42 | comment | added | Membran | Also, if you think that mentioned version of Fisher's test is fine for comparing two distributions, can it also be used for checking uniformity of distribution (i.e. to say that phenotypes within one group were distributed non-uniformly between a finite number of possible phenotypes)? One can do this even in Excel using CHITEST function, but what if I have a distribution similar to the ones above, with lots of phenotypes observed less than 5 times? | |
| Oct 27, 2010 at 22:38 | comment | added | Membran | Isn't it that Fisher's "exact" test actually addresses slightly different question: "...it is used to examine the significance of the association (contingency) between the two kinds of classification" (wiki page). In my case I sought to confirm (or refute) the hypothesis that distributions of phenotypes between 2 groups are similar (equal). When I found that online test (see the first post) named "Chi-square test for equality of distributions" I thought it was precisely for my problem... | |
| Oct 27, 2010 at 20:59 | comment | added | chl | Cannot upvote more, sorry. It seems I hadn't increase the wksp enough :) | |
| Oct 27, 2010 at 20:11 | history | edited | onestop | CC BY-SA 2.5 |
just my usual copyedit tinkering
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| Oct 27, 2010 at 18:51 | comment | added | chl | Interesting, Fisher's test crashed on R. | |
| Oct 27, 2010 at 18:38 | history | edited | onestop | CC BY-SA 2.5 |
wikilink Fisher's 'exact' test for the benefit of any statistical novitiates
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| Oct 27, 2010 at 18:33 | history | edited | onestop | CC BY-SA 2.5 |
execution time added for the curious, if any
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| Oct 27, 2010 at 18:28 | history | answered | onestop | CC BY-SA 2.5 |