→ bmka:如果可以合理的假設pretest與posttest之間是postively 03/07 19:59
→ bmka:correlated,那麼不妨用two sample t-test 03/07 20:00
→ bmka:This will result in efficiency loss and conservative 03/07 20:01
→ bmka:inferential results. 03/07 20:02
→ bmka:等等,我指的是compare posttest measure between groups 03/07 20:05
→ bmka:不是 compare pretest and posttest measure 03/07 20:06
→ bmka:用two sample t-test 來比較 pretest and posttest measures 03/07 20:09
→ bmka:test statistic會變小, p-value 會變大, 所以結論也比較保守 03/07 20:11
→ bmka:Type I error 跟 power 都會變小 03/07 20:13