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Talk:Significance of E. Coli Evolution Experiments (view source)
Revision as of 12:58, March 28, 2009
, 12:58, March 28, 2009→Caveat
==Caveat==
==Caveat==
If SJohnson can provide citations to authors who support the use of chi-square where all expected cell counts are less than one, or where categories are not independent, I look forward to evaluating them.--[[User:ElyM|ElyM]] 12:35, 27 March 2009 (EDT)
If SJohnson can provide citations to authors who support the use of chi-square where all expected cell counts are less than one, or where categories are not independent, I look forward to evaluating them.--[[User:ElyM|ElyM]] 12:35, 27 March 2009 (EDT)
:Wackerly et al. does not say to avoid the test because of low cell frequencies. You're still making a false claim that p-values are always high if cell frequencies are low. The last paragraph you added is just your opinions about the test being inappropriate. Modeling each trial as a statistically independent Bernoulli trial is reasonable. Thus, the chi-square test is appropriate. The assumption from the paper that the numbers of mutants per experiment would never change is an example of a bad way to model an experiment. Note that all p-values in Blount et al. were calculated under that unreasonable assumption. Do you think that if these experiments were recreated, that the total number of mutants would always be exactly the same? [[User:SJohnson|SJohnson]] 08:58, 28 March 2009 (EDT)
== References ==
== References ==
{{reflist}}
{{reflist}}