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- Path: sparky!uunet!cs.utexas.edu!sun-barr!olivea!spool.mu.edu!umn.edu!thompson
- From: thompson@atlas.socsci.umn.edu (T. Scott Thompson)
- Newsgroups: sci.math.stat
- Subject: Binary Correlations. Was: Levels of Measurement?
- Message-ID: <thompson.724607838@daphne.socsci.umn.edu>
- Date: 17 Dec 92 15:57:18 GMT
- References: <92351.201518U53076@uicvm.uic.edu>
- Sender: news@news2.cis.umn.edu (Usenet News Administration)
- Reply-To: thompson@atlas.socsci.umn.edu
- Organization: Economics Department, University of Minnesota
- Lines: 36
- Nntp-Posting-Host: daphne.socsci.umn.edu
-
- Perhaps someone interested in the levels of measurement question might
- be able to help me too.
-
- I have been acting as informal statistical consultant for my wife, who
- is a physician with only an elementary statistical background, in a
- project where she wants measures of association between a fairly large
- number of binary variables in a sample with n=500 and in a subsample
- with n = 260. (These numbers may increase in the future.)
-
- We have been calculating standard Pearson correlation coefficients,
- which to my way of thinking are as good as anything else at describing
- binary associations, since scaling is not an issue for binary data. I
- do not claim to have studied the issue in depth, however.
-
- I am an econometrician and I know that different fields have different
- statistical subcultures and norms, so I am not sure that this is what
- other physicians, biostatisticians, epidemiologists, etc. expect. My
- impression is that medicine is the field where statistical practice is
- most codified, meaning that there are conventions that must be
- satisfied if you want to get published, even if they don't make a
- whole lot of sense in the particular application.
-
- So here is my question:
-
- If you were in my shoes would you stick with the Pearson correlations
- or do something different? If the latter, would you provide a
- reference please.
-
- Related and more interesting question:
-
- What is "the right way" to do this from the point of view of
- statistical theory?
- --
- T. Scott Thompson email: thompson@atlas.socsci.umn.edu
- Department of Economics phone: (612) 625-0119
- University of Minnesota fax: (612) 624-0209
-