Re: jmp incorrectly calculates mean

[chem engineer <chemical_engr@yahoo.com>]

Ron - you should move up to a newer version ...

Ronald Cross <roncross@cox.net> wrote:

Hi all, I am using JMP 4.0.4 for mac running a G4 powerbook with
1GByte of RAM with a 1GHz power pc processor on OS X 10.4.3.
However, this version of jmp runs under OS 9 (classic).
I have noticed that when I do a fit y by x plot and display the
mean and standard deviation, it incorrectly calculate the mean of
each level where y is continuous, numeric and x in nominal. It
appears to be a round off error of some sort. For example, when I
use table summary on the same data, the mean will be roughly 1.4, but
in the mean and std dev display of the fit y by x plot, it appears as
a 1 and have a std dev of 0. Std dev is 0 for all levels since all
numbers are rounded off to the same whole number.

I have loo k in the column info section of the data column and best is
selected as the format. It doesn't occur for all columns and I am
not sure why I am seeing it on some columns and not others.

Any ideas on solving this would be appreciated.

thx
RLC

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