then, you could have them use some software ... enter the data table the right way (depending on how your software lays data out) and see the output and compare to their hand calculations
what i usually do is to give them this as an inclass hands on exercise handout ... we have the table and data in the table ... find the cell, row, column and grand means ... make a graph ... speculate on what is happening ... THEN do the SS calculations and the summary table ... THEN see how software would handle it
another thing that is useful is to use a cell mean table that ... if you plot with one factor on the baseline and the other in the graph ... and REVERSE the orderings .... that you will see a crossover pattern one way and ... NOT a crossover pattern the other way ... which shows that (as i learned the hard way) the pattern we see with a crossover where we "usually" say there is an interaction ... may not be evident when independent variables are reversed for plotting ...
terms like ordinal INTERACTION or DISORDINAL interaction are just descriptions of the graphs ... and NOT the interactions themselves .... long ago, don burrill "straightened" me out on this score
At 04:20 PM 10/31/2002, Jill Binker wrote:
For data, try DASL
http://lib.stat.cmu.edu/DASL/allmethods.html
Click ANOVA.
At 12:29 PM -0500 10/31/02, Lise DeShea wrote:
>List mates:
>
>Do you have any good examples/data sets/exercises that you use to teach
>students about the two-way fixed-effects ANOVA? I'm interested in beefing
>up my presentations and practice exercises in this area. If you'll email
>me off-list at [EMAIL PROTECTED], I'll summarize for the list. Thanks, &
>cheers.
>
>Lise
>
>~~~
>Lise DeShea, Ph.D.
>Assistant Professor
>Educational and Counseling Psychology Department
>University of Kentucky
>237 Dickey Hall
>Lexington KY 40506
>Email: [EMAIL PROTECTED]
>Phone: (859) 257-9884
>
>"... for only by varied iteration can alien conceptions be forced on
>reluctant minds."
> -- Herbert Spencer, in the preface to The Data of Ethics, 1881.
________________________________
Jill Binker
Fathom Dynamic Statistics Software
KCP Technologies, an affiliate of
Key Curriculum Press
1150 65th St
Emeryville, CA 94608
1-800-995-MATH (6284)
[EMAIL PROTECTED]
http://www.keypress.com
http://www.keycollege.com
__________________________________
.
.
=================================================================
Instructions for joining and leaving this list, remarks about the
problem of INAPPROPRIATE MESSAGES, and archives are available at:
. http://jse.stat.ncsu.edu/ .
=================================================================
_________________________________________________________ dennis roberts, educational psychology, penn state university 208 cedar, AC 8148632401, mailto:dmr@;psu.edu http://roberts.ed.psu.edu/users/droberts/drober~1.htm
. . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
