David C. Howell
There is a lot to say about the t test, but I haven't
thought of it yet. I'll fill in as I have time.
- The study of the effects of optimism on the
performance of collegiate swimmers is a nice example to use in class. It is a good study
for use with students in psychology, and it illustrates a variety of issues.
- You could start with looking at the sampling distribution of t
and its associated power.
- There is a lab assignment that will allow students to see
how t changes as a function of the difference between mu1 and mu2, as well as with
the correlation between pre- and post scores. This could be useful. It also touches on
- Two of the examples in the t-test chapter(s) deal with the moon
illusion. Don McReady, at the Univ. of Wisconsin-White Water, has developed
an alternative theory of the illusion and created a set of pages on it. The
link is at http://facstaff.uww.edu/mccreadd/.
This has little to do with statistics, but it does put the examples in a
Dave Howell's Statistical Home Page
University of Vermont Home Page
Last revised: 7/11/98