Sandra Rena Chandler
Thomas W. Moss, Jr. Campus
Tidewater Community College
Norfolk, Virginia 23510
tcchans@tc.cc.va.us
http://www.tc.cc.va.us/faculty/tcchans
757-822-1335
--------------------------
>>> "Brian E. Smith" <smithb@management.mcgill.ca> 07/03 12:57 PM >>>
Does anyone have experience with logistic regression, particularly using
the TI-83. I am trying to fit some data points in a logistic regression
and the TI-83 works for some data sets but not others. For example, when =
I
run the regression on the data set
(1, 3697)
(2, 2100)
(17, 1603)
(20, 1127)
I get the output: y =3D c/(1 + ae^(-bx)) with a =3D .4799, b =3D -.1028 =
and c =3D
5658.4
However when I add one extra ordered pair (6, 2512) I get a domain error
message.=20
Any idea what is going on?
Also do you know of any other calculator or stats software that will do =
the
logistic regression (Minitab has a section called logistic regression but
it is something different - it seems to be an alternative to the GLM
regression model which is for use with binary, ordinal and nominal data =
sets.)
Any help wil be appreciated.
Thanks
Brian
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