[R] Calculate confidence interval of the mean based on ANOVA

[Paul]

Paul wrote:
> I am trying to recreate an analysis that has been done by another group 
> (in SAS I believe).  I'm stuck on one part, I think because my stats 
> knowledge is lacking, and while it's OT, I'm hoping someone here can help.
>
> Given this dataframe;
>
> <snip>
Well, that will teach me to read the question ! The previous analysis 
stated (quite clearly) that they calculated confidence intervals using 
number of runs - 1 degrees of freedom, so doing my t quantile over 5 df 
instead of 17 produced the right answer.

Paul.