Dear R ussers,
My question is, How can my mean be outside the confidence intervals ?!
I think i have the answer for it, but i would like to hear some other
ideas on it.
First my data is not continuose but categorical, it is a titre calculated
on a dilution serie.
It is stored as a column of
Tom Willems wrote:
Dear R ussers,
My question is, How can my mean be outside the confidence intervals ?!
I think i have the answer for it, but i would like to hear some other
ideas on it.
First my data is not continuose but categorical, it is a titre calculated
on a dilution
If you look at ?boxplot.stats, you will find that the confidence interval it
reports is centred on the median and :
The notches (if requested) extend to '+/-1.58 IQR/sqrt(n)'.
If you have skewed data it is very possible (as you have found) that the mean
is outside median+/-1.58 IQR/sqrt(n).
