At 12:41 PM 5/22/00 -0500, Herman Rubin wrote: (in response to bob hayden's
note)
>As for outliers, the appropriate meaning for them is that they
>are observations which are incorrect, or for which the assumptions
>of the model are invalid. Those should be removed, as should
>any others of tha
In article <[EMAIL PROTECTED]>,
Bob Hayden <[EMAIL PROTECTED]> wrote:
>Least squares methods are in some sense optimal when the "errors"
>estimated by the residuals are normally distributed. They are
>questionable when the errors are multimodal, strongly skewed, or
>afflicted with outliers.
L
The standard deviation of a single batch of numbers is a typical value
for the residuals (deviations from the mean). If you divide by n, it
is the RMS mean of the residuals. You can check your calculation of
the s.d. by comparing it to the residuals. The mean is the measure of
center that minim
