Apple of Different Rootstock
The goal is to test if the mean vector of the four variables is same across 6 stratas of the experiment.
data(rootstock)
A data frame with 48 observations on the following 5 variables.
rootstockSix different rootstocks
y1trunk girth at 4 years
y2extension growth at 4 years
y3trunk girth at 15 years
y4weight of tree above ground at 15 years
Rencher, A.C. (2002). Methods of Multivariate Analysis, 2e. J. Wiley.
data(rootstock) attach(rootstock) rs <- rootstock[,1] rs <- factor(rs,ordered=is.ordered(rs)) # Too important a step root.manova <- manova(cbind(y1,y2,y3,y4)~rs) summary(root.manova, test = "Wilks")
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