Sigma squared or sigma square? Hotelling's T-squared or T-square?
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Sat, Oct 19, 2019 at 7:38 AM Therneau, Terry M., Ph.D. via R-help <
r-help@r-project.org> wrote:
> Martin,
>A fun question.
>
> Looking back at my oldest books, Feller (1950)
Martin,
A fun question.
Looking back at my oldest books, Feller (1950) used chi-square.
Then I walked down the hall to our little statistics library and looked at
Johnson and
Kotz, "Continous Univariate Distributions", since each chapter therein has
comments about
the history of the
What a delightful question. Bill Cochran discussed this in class
one day about 50 years ago. He said the British usage (which I think
he said was chi-squared,
as is consistent with the other memories in this thread)
is what he learned and previously used. But he had been in the US for
so long
On Sat, 19 Oct 2019, Jim Lemon wrote:
My suggestion is that while "chi-square" may be more correct in the
derivation of the statistic, "chi-squared" is more consistent with
colloquial usage in using the passive form.
Jim,
This is a cogent suggestion that's pragmatic and defensible.
Thank
I have thought about this one myself, and just reading the posts and
links has afforded me a more informed viewpoint. My guess is that it
boils down to a contest between mathematics and prosody. To speakers
of English, "square" in the mathematical sense implies the active
form such as "I square
I have the vague impression that "chi-squared" is more common in British
usage and "chi-square" more common in American usage. I'm pretty sure
that either is acceptable, although "chi-squared" sounds much better to
my ear.
Of course within a given document (or collection of related
Dear Martin,
Others struggle with this inconsistency as well; I found this discussion
useful:
https://math.stackexchange.com/questions/1098138/chi-square-or-chi-squared
Denes
On 10/18/19 2:51 PM, Martin Maechler wrote:
As it's Friday ..
and I also really want to clean up help files and
As it's Friday ..
and I also really want to clean up help files and similar R documents,
both in R's own sources and in my new 'DPQ' CRAN package :
As a trained mathematician, I'm uneasy if a thing has
several easily confusable names, .. but as somewhat
humanistically educated person, I know
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