testing for linearity

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3 total messages Started by mgranaas Tue, 15 Dec 1992 15:23

#738

Author: mgranaas
Date: Tue, 15 Dec 1992 15:23

15 lines
1189 bytes

The simplest test for linearity that I have found is to calculate the
conditional means of y on x.  Follow that with plotting and calculating
the correlation coefficient.  If your correlation is near +/- 1 your
data are probably linear in form.  If not, the plot should show a fairly
clear picture of what shape the relation takes.  If the plot does not
show a fairly clear picture, then you do not have sufficient data at
each level of x to dampen out the error.  (This happens frequently, and
at that point you're back to square one--sorry)

Michael Granaas
Dept. of Psychology
University of South Dakota
mgranaas@charlie.usd.edu

How do I get a sig file into this post???

Re:Statistics packages for IBM pc

#740

Author: R.C. Jones
Date: Tue, 15 Dec 1992 17:57

11 lines
905 bytes

I'm looking for a statistics/probability program for the IBM pc.
Any reccomendations? How to order and approx. how much?
Will be involved in an introductory college course in probability
and statistics. Thanks for any advice.


-- 
  |___________________________________________________________________| 
>>| Dik Jones, Earth Model Interpretation   Internet: rcj@Chevron.com |
  | Chevron Petroleum Technology Company.        Tel:  (310) 694-7056 | 
  | La Habra, California 90633-0446              Fax:  (310) 694-7063 |

Re:Statistics packages for IBM pc

#748

Author: R0264
Date: Wed, 16 Dec 1992 17:49

26 lines
1764 bytes

You might try |STAT from Gary Perlman at the Wang Institute (as of 1986)
of Graduate Studies, Tyng Road, Tyngsboro, MA 01879.  I have no e-mail
adress.  A few years ago he asked only about $15 to cover mailing,
etc., but required a SASE mailer for floppy disks.  You'd best write
for info first.   It has a lot of data manipulation capabilities,
most standard simple stat routines, but almost no graphics.  He ported
it from his own UNIX version to MS-DOS.
                            Phil Emerson
                            Cleveland State University
 
 
In article <8755@lhdsy1.lahabra.chevron.com>
rcj@lhdsy1.lahabra.chevron.com (R.C. Jones) writes:
 
>
>I'm looking for a statistics/probability program for the IBM pc.
>Any reccomendations? How to order and approx. how much?
>Will be involved in an introductory college course in probability
>and statistics. Thanks for any advice.
>
>
>--
>  |___________________________________________________________________|
>>>| Dik Jones, Earth Model Interpretation   Internet: rcj@Chevron.com |
>  | Chevron Petroleum Technology Company.        Tel:  (310) 694-7056 |
>  | La Habra, California 90633-0446              Fax:  (310) 694-7063 |

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