1ArgumentExample调查1,Selectivesample:样本选择,一部分被排除在外Onemajorproblemisaboutthesampletheauthorstudiedinthesurvey
theauthorconsidersonly
(selectivesub-groups)although(thesub-groupstheauthorstudied)doconstituteasignificantpartof(thewholegeneralpopulation),however,(manyothersub-groups)areactuallyexcludedfromthesurvey
Perhaps
withoutrulingoutallthepossibilitiesabove,theauthorcouldnotmakeanygeneralconclusionabout
merelybasedon(selectivesub-groups)
4,14,16,45,63,65,67,80,84,88,90,97,123,146,154,156,168,179,185,193,196,207,227,231,232,236,238,2392,Quantityofthesample样本数量(pointingoutthatthecurrentsampleistoosmallinitssize)(thefactcitedbytheauthor)couldhardlyillustratetheassumptionthat
becausetheauthorprovidesonlyNsamplesof(thegeneralpopulation),however,(thelimitedsample)mightnotberepresent