R help - Oct 2019 - "chi-square" | "chi-squared" | "chi squared" | "chi, square"

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 distribution.

 ?a.? They use 'chi-square' throughout their history section, tracing
the distribution
back to work in the 1800s.? But, those earliest papers apparently didn't
name their
results as chi- whatever, so an "origin" story didn't pan out.

 ?b. They have 13 pages of references, and for fun I counted the occurence of
variants.?
The majority of papers don't have the word in the title at all and the next
most common is
the Greek symbol. Here are the years of the others:

chi-square: ? 73 43 65 80 86 73 82 73 69 69 78 64 64 86 65 86 82 82 76 82 88 81
74 77 87
86 93 69 60 88 88 80 77 41 59 79 31
chi-squared: 72 76 82 83 89 79 69 67 77 78 69 77 83 88 87 89 78
chi:? 92 73 89 87
chi-squares: 77 83
chi-bar-square: 91

There doesn't look to be a trend over time.? The 1922 Fisher reference uses
the Greek
symbol, by the way.

Terry T


	[[alternative HTML version deleted]]

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 at r-project.org> wrote:
> 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 distribution.
>
>   a.  They use 'chi-square' throughout their history section,
tracing the
> distribution
> back to work in the 1800s.  But, those earliest papers apparently
didn't
> name their
> results as chi- whatever, so an "origin" story didn't pan
out.
>
>   b. They have 13 pages of references, and for fun I counted the occurence
> of variants.
> The majority of papers don't have the word in the title at all and the
> next most common is
> the Greek symbol. Here are the years of the others:
>
> chi-square:   73 43 65 80 86 73 82 73 69 69 78 64 64 86 65 86 82 82 76 82
> 88 81 74 77 87
> 86 93 69 60 88 88 80 77 41 59 79 31
> chi-squared: 72 76 82 83 89 79 69 67 77 78 69 77 83 88 87 89 78
> chi:  92 73 89 87
> chi-squares: 77 83
> chi-bar-square: 91
>
> There doesn't look to be a trend over time.  The 1922 Fisher reference
> uses the Greek
> symbol, by the way.
>
> Terry T
>
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]