Re: [R] a confidence interval from an ANOVA model

2013-01-22 Thread Yvonnick Noel
Hello Erin, You might want to compute *credibility* intervals instead. They have the true meaning of intervals within which the *unknown parameter* (not the sample statistic) has a fixed probability to lie (confidence intervals do not). The AtelieR package, especially in its "Bayesian infere

Re: [R] a confidence interval from an ANOVA model

2013-01-21 Thread Eik Vettorazzi
Hi Erin, how about this: dta<-read.table(textConnection("trt resp A 23 A 28 A 37 A 30 B 37 B 44 B 31 B 35 C 42 C 47 C 52 C 38"),header=T) summary(ano<-aov(resp~trt,dta)) ano0<-update(ano,.~.+0) confint(ano0) # and the corresponding means are coef(ano0) # or use the effects package library(effect

[R] a confidence interval from an ANOVA model

2013-01-19 Thread Erin Hodgess
Dear R People: I have a data set with trt and resp: trt resp A 23 A 28 A 37 A 30 B 37 B 44 B 31 B 35 C 42 C 47 C 52 C 38 And I did read.table, constructed an aov object and ran the summary on the aov object. I also ran the TukeyHSD function. All is well so far. My question is: is there a way to