On Wed, 8 Dec 1999, Mike Wogan wrote, in response to Luv 2 muah 143's
question:
> > 5 of 10 volunteers are randomly selected to receive self-defense
> > training. The other 5 receive no training. At the end of the
> > training period, all subjects complete a self-confidence
> > questionnaire.
> > a.) Is there a difference in self-confidence between the 2 groups
> > (p<.01)?
> > b.) What are the effects of self-defense traing on self-confidence
> > (I'm assuming a two-tailed test?). Explain analysis
> Without a pre-test measure of self-confidence, taken prior to the
> training, even if there is a significant difference post-training, it's
> not possible to tell whether the difference is the result of the
> training or was there to begin with.
Oh, come on, Mike. What did you think "randomly selected" was
in there for? (Or were you trying to confuse the querent because he
had the effrontery to ask a homework (or perhaps exam) question of this
list?)
> If there is a pre-post measurement of self-confidence, then you need a
> mixed model Anova, with Training vs. No Training as the between groups
> factor and Pre-Post as the within groups factor.
This sure must sound scary to someone who's having trouble with
the first semester of an elementary stats course!
-- DFB.
------------------------------------------------------------------------
Donald F. Burrill [EMAIL PROTECTED]
348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
MSC #29, Plymouth, NH 03264 603-535-2597
184 Nashua Road, Bedford, NH 03110 603-471-7128
