Robert Ehrlich <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Calculation of eigenvalues and eigenvalues requires no assumption.
> However evaluation of the results IMHO implicitly assumes at least a
> unimodal distribution and reasonably homogeneous variance for the same
> reasons as ANOVA or regression. So think of th consequencesof calculating
> means and variances of a strongly bimodal distribution where no sample
> ocurrs near the mean and all samples are tens of standard devatiations
> from the mean.
The largest number of standard deviations all data can be from the mean is 1.
To get some data further away than that, some of it has to be less than 1 s.d.
from the mean.
Glen
=================================================================
Instructions for joining and leaving this list and remarks about
the problem of INAPPROPRIATE MESSAGES are available at
http://jse.stat.ncsu.edu/
=================================================================
