Questions tagged as 'anova'

I'm trying to run a basic one-way ANOVA in R. library(drc) data=S.alba aov(DryMatter~Dose,data=S.alba) However, there are 7 treatments in these data. Therefore, DF (degree of freedom) should be 7-1 = 6, but R shows DF as 1. I do not underst...

Hello, I have data ( link ) from a completely randomized experiment, where the (0.25, 0.50, 0.75, and 1.00) of different fungicides (4 natural + 1 chemical + control) with water). In total there were 24 treatments x 4 replications each. Si...

I'm trying to do a double factorial or two-way anova analysis.  I would like to know how to generate the differentiation letters between treatments for both factors.  This differentiation is common in scientific articles in which it is often pre...