J S <yulya258 <at> hotmail.com> writes: > I compare mean monthly body temperature between two age classes of turtles overwintering underground. > > lm(body_tem ~ Month*Year*Age_Class) > TukeyHSD(aov(body_tem ~ Month*Year*Age_Class, a)) > > The Tukey HSD as well as the planned contrasts method showed significant differences between the two age > classes, but insignificant differences between the two age classes at the same levels of months. > > In the opposite, using a t-test for comparison of independent means (i.e. without using the ANOVA) it > demonstrated insignificant differences between the two age classes. What result is correct?
If the more detailed breakdown shows an effect, use it, because it tells you that grouping was over different classes. Dieter ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
