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2003 Jun 26
1
Correct contrast for unreplicated 2K factorial design
Hi all,
I have been trying to reproduce an analysis from Douglas Montgomery?s
book on design and analysis of experiments. Table 6.10 of example 6.2 on
page 246, gives a table as follows:
> NPK <- expand.grid(A=mp,B=mp,C=mp,D=mp)
> Rate <- c(45,71,48,65,68,60,80,65,43,100,45,104,75,86,70,96)
> filtration <- cbind(NPK,Rate)
> filtration
A B C D Rate
1 - - - - 45
2