From: Alan T. Arnholt (arnholt@math.appstate.edu)
Date: Tue 10 Apr 2001 - 00:14:12 EST
Message-ID: <SIMEON.10104091012.D@WALKER231.math.appstate.edu>
On Mon, 09 Apr 2001 15:43:13 +0200 Troels Ring
<tring@gvdnet.dk> wrote:
> lot <- c(30,20,60,80,40,50,60,30,70,60)
> hours <- c(73,50,128,170,87,108,135,69,148,132)
> z1 <- lm(hours~lot)
> new <- data.frame(x=80)
> predict(z1,new,interval="confidence",level=90)
you will also need to change your level to read .90 versus
90
> predict.lm(z1,newdata=new,interval="confidence",level=.90)
fit lwr upr
[1,] 170 166.9245 173.0755
Alan
----------------------
Alan T. Arnholt
arnholt@math.appstate.edu
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