Hi, You didn't provide a reproducible example (http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example)? So, it is difficult to comment. Using the dataset(sweetpotato) library(agricolae) data(sweetpotato) m1<-aov(yield~virus, data=sweetpotato) df1<-df.residual(m1) MSerror1<-deviance(m1)/df1 out <- LSD.test(sweetpotato$yield,sweetpotato$virus,df1,MSerror1) out$statistics #??? Mean????? CV? MSerror????? LSD ?# 27.625 17.1666 22.48917 8.928965 A.K. Hi, I have been trying to do a LSD test on some data but I get everything except the actual LSD value m1 <- aov(T50~WPT , data = P) m1 TukeyHSD(m1) df<-df.residual(m1) MSerror<-deviance(m1)/df LSD.test(P$T50,P$WPT,df,MSerror) also tried a few variations but kept getting this same result Study: LSD t Test for T50 Mean Square Error: ?21.78628 WPT, ?means and individual ( 95 %) CI ? ? ? ? T50 ? std.err r ? ? ? LCL ? ? ? UCL ? ? ?Min. ? ? ?Max. a 135.64286 4.0864385 4 127.31905 143.96666 126.00000 144.00000 b ?40.30594 0.5911702 4 ?39.10177 ?41.51012 ?39.00000 ?41.76923 c ?77.33800 1.9456540 4 ?73.37483 ?81.30116 ?72.00000 ?81.23077 d ?39.50893 1.6959821 4 ?36.05433 ?42.96353 ?36.42857 ?42.85714 e ?42.34801 1.3507746 4 ?39.59657 ?45.09945 ?39.56250 ?46.00000 f ?33.52500 4.1474251 4 ?25.07697 ?41.97303 ?21.60000 ?40.28571 g ?94.16450 2.9264069 3 ?88.20361 100.12540 ?90.85714 100.00000 h ?54.11667 1.4952703 4 ?51.07090 ?57.16243 ?51.00000 ?58.00000 i ?79.00879 1.2037678 4 ?76.55680 ?81.46079 ?75.69231 ?81.42857 j ?74.39560 2.1751581 4 ?69.96495 ?78.82626 ?68.00000 ?77.53846 k ?73.35000 1.6317169 4 ?70.02630 ?76.67370 ?69.00000 ?76.80000 alpha: 0.05 ; Df Error: 32 Critical Value of t: 2.036933 Minimum difference changes for each comparison Means with the same letter are not significantly different. Groups, Treatments and means a ? ? ? ?a ? ? ? 135.6 b ? ? ? ?g ? ? ? 94.16 c ? ? ? ?i ? ? ? 79.01 c ? ? ? ?c ? ? ? 77.34 c ? ? ? ?j ? ? ? 74.4 c ? ? ? ?k ? ? ? 73.35 d ? ? ? ?h ? ? ? 54.12 e ? ? ? ?e ? ? ? 42.35 e ? ? ? ?b ? ? ? 40.31 ef ? ? ? d ? ? ? 39.51 f ? ? ? ?f ? ? ? 33.52 How do I get a LSD value??? Thanks