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2007 Aug 05
0
null hypothesis for two-way anova
...ull hypothesis
H_0: a_i = 0 for all i in A
or
H_0: a_m = a_n for any m and n in A?
Consequently the same questions for interaction effects. Starting with
the model
y = a_i + b_j + f_ij , i in A and j in B
is the tested null hypothesis
H_0: f_ij = 0 for all i in A and j in B
or
H_0: f_ij = f_mn for any i and m in A and j and n in B?
More specific to R the questions is formulated as R code in the
appendix. Unfortunately I did not find this in the documentation.
Thanks in advance,
Axel
Appendix:
=========
> A = factor(c(rep(1, 10), rep(0, 5)))
> B = factor(c(rep(0, 5), rep(1,...