----- Original Message -----
From: Donald F. Burrill <[EMAIL PROTECTED]>
To: Mike Wogan <[EMAIL PROTECTED]>
Cc: Luv 2 muah 143 <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Wednesday, December 08, 1999 12:41 PM
Subject: Re: could someone help me with this intro to stat. problem
| 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
|
|
-------------- Joe Ward writes ------
Hi Don, et al --
While it seems that the question is stimulated from a student's assignment,
it seems to me that students should be given the "power they deserve"
to do something useful when they complete their course of instruction.
You indicated that--
"This sure must sound scary to someone who's having trouble with
the first semester of an elementary stats course!"
IT SHOULD NOT BE SCARY.
If students can't "control for the uncontrollable" such as "PRE-TEST", or
GENDER, etc. then they are not being given what they deserve in
A NON-CALCULUS ELEMENTARY STATS COURSE.
I realize that I am an "outlier" in what I believe to be a lack of SALESMANSHIP
about the power that statistics can give students -- before they are "turned off".
But talented high school students can do it -- so why not college students?
But I get more cynical in my old age!
-- Joe
*************************************************************
Joe Ward Health Careers High School
167 East Arrowhead Dr 4646 Hamilton Wolfe
San Antonio, TX 78228-2402 San Antonio, TX 78229
Phone: 210-433-6575 Phone: 210-617-5400
Fax: 210-433-2828 Fax: 210-617-5423
[EMAIL PROTECTED]
http://www.ijoa.org/joeward/wardindex.html
*************************************************************
