Displaying 2 results from an estimated 2 matches for "mu_12".
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mu_1
2011 Nov 08
2
why NA coefficients
Hi, I am trying to run ANOVA with an interaction term on 2 factors (treat has 7 levels, group has 2 levels). I found the coefficient for the last interaction term is always 0, see attached dataset and the code below:
> test<-read.table("test.txt",sep='\t',header=T,row.names=NULL)
> lm(y~factor(treat)*factor(group),test)
Call:
lm(formula = y ~ factor(treat) *
2013 Jan 12
2
Interpreting coefficients in linear models with interaction terms
Hi,
I am trying to interpret the coefficients in the model: RateOfMotorPlay ~
TestNumber + Sex + TestNumber * Sex where there are thee different tests and
Sex is (obviously) binary. My results are: Residuals:
Min 1Q Median 3Q Max
-86.90 -26.28 -7.68 22.52 123.74
Coefficients:
Estimate Std. Error t value Pr(>|t|)
(Intercept) 29.430 6.248