T-test for grouped data in R commander -
i've following data format entity measure1 measure2 a1 1.5 1.4 a1 1.9 1.7 a1 1.8 1.5 b1 2.7 2.5 b1 3.0 2.9 b1 3.1 2.7 b1 2.8 2.9 c1 1.7 1.5 c1 1.7 1.8 ... i wish pairwise t-test entity factor , @ measure1 , measure2 levels. can in r there way in r commander gui? in r commander paired t-test considers values of measure1 , measure2 columns , doesn't perform t-test groupwise. 'independent sample t-test' option grayed out too. if abandoned paired-t.test formalism regression: lm( measure2 ~ measure1 + entity, data=dfrm) this give estimate of mean increase in measure2 (from measure 1) group. thats eally paired t-tests doing, anyway.