Hello Doug

here is an answer to your question (see below) provided by some kindly statisticians

blaine

From: Richard Scheaffer [mailto:[EMAIL PROTECTED]
Sent: Monday, October 01, 2007 7:18 PM
To: Applebaugh, Gwendolyn N.
Subject: Re: [tips] History of z-scores



On the other hand, you might try these references. It seems that Fisher never gave a good reason as to why he called this statistic z.

Dick

The terms z and the z DISTRIBUTION were introduced by R. A. Fisher in "On a Distribution Yielding the Error Functions of Several well Known Statistics" <http://www.library.adelaide.edu.au/digitised/fisher/36.pdf> , Proceedings of the International Mathematics Congress, Toronto (1924). Fisher's development of the analysis of variance in this paper and in his book Statistical Methods for Research Workers <http://psychclassics.yorku.ca/Fisher/Methods/index.htm> (1925) was based on the z distribution. Fisher's z is related to the modern F by z = ยจ ln F


[See http://members.aol.com/jeff570/z.html
and
http://digital.library.adelaide.edu.au/coll/special//fisher/36.pdf]

Dick

On 10/1/07 7:43 PM, "Richard Scheaffer" <[EMAIL PROTECTED]> wrote:

I'm sorry to say that I do not know the answer to this, but you might find it in the Oxford Dictionary of Statistical Terms if you can locate a copy in a
library.

Dick Scheaffer





----- Original Message ----- From: "Wallen, Douglas J" <[EMAIL PROTECTED]> To: "Teaching in the Psychological Sciences (TIPS)" <[email protected]>
Sent: Wednesday, September 26, 2007 11:19 AM
Subject: [tips] History of z-scores


Hello all,

I have wondered occasionally why z-scores were named "z" and who named them. I have done some browsing for the information but have not yet located it. Does anyone have a reference or knowledge of the z-score's origins?

Thanks,


Douglas Wallen
Psychology Department, AH 23
Minnesota State University, Mankato
Mankato, MN 56001

E-mail: [EMAIL PROTECTED]
Phone: (507) 389-5818


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