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re: st: Re: Anova
.
I have an experiment where a component is stressed (nominally to
the same
level) and the stress measured a constant time afterwards for 5
different
materials. I wanted to investigate the effect of material on the
difference
in stress giving me the simple model:
anova diff system
The problem is that the initial nominal stress is not constant and
may have
en effect on diff.
How can do I formulate this model? I tried
anova diff f1, continuous(f1) but f1 now enters the model as a both
a main
factor and a component of diff.
Are you measuring stress on two or more occasions, or just the once?
It's also hard to understand exactly what you mean when you say the
stress was to the same level in the first sentence, but then you say
it's not constant later on.
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