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Talk:PNAS Response to Letter (view source)
Revision as of 13:34, September 20, 2008
, 13:34, September 20, 2008reply re: Point 5
:::: No, we're talking about how Lenski combined a large study (which did not really support Lenski's hypothesis) with small studies (which Lenski claims does support his hypothesis). The studies were not combined in a logical manner with proper weighting given to the much bigger size of the large study.--[[User:Aschlafly|Aschlafly]] 23:15, 19 September 2008 (EDT)
:::: No, we're talking about how Lenski combined a large study (which did not really support Lenski's hypothesis) with small studies (which Lenski claims does support his hypothesis). The studies were not combined in a logical manner with proper weighting given to the much bigger size of the large study.--[[User:Aschlafly|Aschlafly]] 23:15, 19 September 2008 (EDT)
:::::Aschlafly, have you read the paper on z-transforms which explains the statistical technique used? You can download a .pdf copy of the paper for free [http://www3.interscience.wiley.com/journal/118663174/abstract here]. --[[User:BillA|BillA]] 06:30, 20 September 2008 (EDT)
:::::Aschlafly, have you read the paper on z-transforms which explains the statistical technique used? You can download a .pdf copy of the paper for free [http://www3.interscience.wiley.com/journal/118663174/abstract here]. --[[User:BillA|BillA]] 06:30, 20 September 2008 (EDT)
:::::: You say "statistical technique used," but you should have said "statistical technique ''cited''." In fact, a close reading of the Z-transform paper provides more support for Point 5: combined studies must be weighted based on sample size:
::::::: "When there is variation in the sample size across studies, there can be a noticeable difference in the power of the two methods, with the weighted Z-approach being superior in all cases. As such, we should always prefer the weighted Z to the unweighted Z-approach when the independent studies test the same hypothesis."[http://www3.interscience.wiley.com/journal/118663174/abstract see p. 1371].
:::::: In other words, the cited paper actually ''supports'' Point 5.--[[User:Aschlafly|Aschlafly]] 09:34, 20 September 2008 (EDT)