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parametr
2004 Mar 29
2
Confidence Intervals for slopes
Hi,
I'm trying to get confidence intervals to slopes from a linear model
and I can't figure out how to get at them. As a cut 'n' paste example:
#################
# dummy dataset - regression data for 3 treatments, each treatment with
different (normal) variance
x <- rep(1:10, length=30)
y <- 10 - (rep(c(0.2,0.5,0.8), each=10)*x)+c(rnorm(10, sd=0.1),
rnorm(10,