Re: 2 factor ANOVA with empty cells

2000-11-01 Thread Joe Ward
Right you are, Elliot. However, when one finds "no-interaction" among all of those cells that are present, then one can feel "better" about estimating the "missing" cell values. Of course, there could be a surprising explosion!! The more interaction that is detected the more dangerous it can be.

Re: 2 factor ANOVA with empty cells

2000-11-01 Thread Elliot Cramer
Jeff E. Houlahan <[EMAIL PROTECTED]> wrote: : Is it ever appropriate to do a 2-factor unreplicated ANOVA with : empty cells if you aren't sure there is no interaction between the ^ you can test the part of the interaction that is testable, but of course you can never know about the rest.

Re: Sample Size Question

2000-11-01 Thread Rich Ulrich
- several questions, explicit and implicit - On Tue, 31 Oct 2000 16:17:34 -0800, "Brian Vuong" <[EMAIL PROTECTED]> wrote: " I work for a bank. I have a data set with 2,600,000 observations[1]. I would like to determine an auditing sample[2] size that is statistically significant[3] within 1%

November Issue of SecondMoment

2000-11-01 Thread secondmoment
Please note the November issue of SecondMoment has been posted at http://www.secondmoment.org . This month we are featuring a discussion with Dr. Hal White on the subject of Reality Check for data mining, a follow-up to last month’s discussion on artificial neural networks. As always we welcome yo

Re: Cross-correlation of two random signals gives bimodal distribution

2000-11-01 Thread Robert J. MacG. Dawson
I don't knwo Matlab, but: > > I create two random signals (each 100 points from gaussian distribution > from -1 to 1) You mean 100 IID Gaussian-distributed points, indexed by values from -1 to 1? (I'm assuming this, anyway.) and find the maximum cross-correlation value (eithe

Re: What's type III?

2000-11-01 Thread Robert J. MacG. Dawson
"Werner W. Wittmann" wrote: > > > Herman and N.N., > > type III error means measuring the wrong construct or something > > nonexistent.In my German book about evaluation research(1985) I cited the > > following: > > "Statistician worry about two types of errors..: > > Type I error is reject

Re: What's type III?

2000-11-01 Thread William P. Clay
Herman Rubin wrote: > In article <8tl9ir$j9g$[EMAIL PROTECTED]>, kj0 <[EMAIL PROTECTED]> wrote: > > >What is a type III statistical error? > >(I know about types I and II). > >Thanks, > > This is the most common type; doing the wrong problem. > Herman, Great one! Made my day. -- Bill Cla

Re: strange

2000-11-01 Thread Art Kendall
your question is more a mathematical psych or psychometric one. see [EMAIL PROTECTED] http://www.topica.com/lists/psychometrics Susan R Murray wrote: > About 30 people have listed this newsgroup as the reason they came to > the test and yet I have had not one reply on where/ how I can get help >

web assignment 3

2000-11-01 Thread dennis roberts
this is the third in our series of short www assignments for extra credit in the edpsy 400 class due on ... wednesday november 22 ... day before thanksgiving holiday   using any or all of the following search engines, http://www.google.com http://www.directhit.com http://www.alltheweb.com i

Re: Sample Size Question

2000-11-01 Thread Art Kendall
Assuming that you -- have a dichotomous dependent variable -- are using the conventional 95% confidence level -- want the margin of error around an obtained percentage to be no larger than 1 percentage point. -- don't have an expectation of what the resulting percentage will be n= N *

Re: replication of "significant" results

2000-11-01 Thread Thom Baguley
Karl L. Wuensch wrote: > misunderstanding of the logic of hypothesis testing. Sigh. Maybe Frank > Schmidt is correct when he suggests that we abandon tests of significance > (Schmidt, F. L. (1996). Statistical significance testing and cumulative > knowledge in psychology: Implications for train