Re: IRT/Rasch Modeling with SAS?

Hi Lee, If you go to my web page for Latent Trait and Item Response Theory (IRT) Models, http://ourworld.compuserve.com/homepages/jsuebersax/lta.htm (please let me know if this link doesn't work) that will point to several other pages that might help. > Then the IRT curve that I am loo

How's this for a 'brain-storming' idea?!?

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Optimal Sample Size Determined by Confidence Interval

I am uncertain about the solution to the problem for which I am trying to solve. I am hoping that someone might help guide me to the correct solution. I have a discrete distribution (say 100) with a dichotomous population (either good or bad). There is no knowledge of the population split until

Re: One tailed vs. Two tailed test

[EMAIL PROTECTED] wrote: > > > More importantly, I would say: DON'T DO TESTS. Instead, try to find > models that you would be prepared to use to predict the response > in as-yet untried circumstances. > -- Hypothesis testing is simply one useful method of identifying 'models that you would be

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

[EMAIL PROTECTED] (Radford Neal) wrote: >[ snip, baseball game; etc. ] >> In this context, all that matters is that there is a difference. As >> explained in many previous posts by myself and others, it is NOT >> appropriate in this context to do a significance test, and ignore the >> differen

Re: One tailed vs. Two tailed test

On 13 Mar 2001 21:18:38 GMT, [EMAIL PROTECTED] () wrote: >In article <[EMAIL PROTECTED]>, > RD <[EMAIL PROTECTED]> writes: >>On 13 Mar 2001 07:12:33 -0800, [EMAIL PROTECTED] (dennis roberts) wrote: >> >>>1. some test statistics are naturally (the way they work anyway) ONE sided >>>with res

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

[EMAIL PROTECTED] (Radford Neal) wrote: >[ snip, baseball game; etc. ] >> In this context, all that matters is that there is a difference. As >> explained in many previous posts by myself and others, it is NOT >> appropriate in this context to do a significance test, and ignore the >> differenc

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

Mr. Ulrich'a comments are even more Landgrebian than his previous ones. For those who don't recall, Earl Landgrebe was a Republican congressman from Indiana in 1974. A self made man who ran a trucking company, Landgrebe sided strongly, if inarticulately, with Richard Nixon during the Watergate

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

Thom, This is a reasonable question to ask. Thom: In the original thread, I referred to the utility function relating citations to quality, etc, and I'm aware of numerous difficult issues regarding the evaluation of this information. My comments, as I indicated, were addressed primarily to the

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

Actually, in practice, the decisions are seldom made on the basis of rational evaluation of data. They are usually made on the basis of political pressure, with thin, and obviously invalid, pseudo-rationalizations on the basis of data that, on close examination, have little or no necessary relatio

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

On Fri, 09 Mar 2001 15:53:12 +, Thom Baguley <[EMAIL PROTECTED]> wrote: >Irving Scheffe wrote: >> Imagine it is 1961. Our question is, which outfield has better >> home run hitters, the Yankees or Detroit? Here are the numbers >> for the Yankee and Tiger starting Outfields. >> >> Y

Re: One tailed vs. Two tailed test

Responses to various folks. And to everyone touchy about one-tailed tests, let me make it quite clear that I am only promoting them as a way of making a sensible statement about probability. A two-tailed p value has no real meaning, because no real effects are ever null. A one-tailed p valu

Re: One tailed vs. Two tailed test

In article <[EMAIL PROTECTED]>, RD <[EMAIL PROTECTED]> writes: >On 13 Mar 2001 07:12:33 -0800, [EMAIL PROTECTED] (dennis roberts) wrote: > >>1. some test statistics are naturally (the way they work anyway) ONE sided >>with respect to retain/reject decisions >> >>example: chi square test f

Re: One tailed vs. Two tailed test

In article <[EMAIL PROTECTED]>, RD <[EMAIL PROTECTED]> wrote: >On 13 Mar 2001 07:12:33 -0800, [EMAIL PROTECTED] (dennis roberts) wrote: >>1. some test statistics are naturally (the way they work anyway) ONE sided >>with respect to retain/reject decisions >>example: chi square test for independ

Re: One tailed vs. Two tailed test

well, help me out a bit i give a survey and ... have categorized respondents into male and females ... and also into science major and non science majors ... and find a data table like: MTB > chisquare c1 c2 Chi-Square Test: C1, C2 Expected counts are printed below observed counts

Re: java - statistic

have a look at http://members.aol.com/johnp71/javastat.html i think the answer is yes At 06:00 PM 3/13/01 +, Paolo Covelli wrote: >Is JAVA suitable to develop programs of statistic or a more specific >language exists? > >Paolo > > > > >===

Re: One tailed vs. Two tailed test

On 13 Mar 2001 07:12:33 -0800, [EMAIL PROTECTED] (dennis roberts) wrote: >1. some test statistics are naturally (the way they work anyway) ONE sided >with respect to retain/reject decisions > >example: chi square test for independence ... we reject ONLY when chi >square is LARGER than some CV .

java - statistic

Is JAVA suitable to develop programs of statistic or a more specific language exists? Paolo = Instructions for joining and leaving this list and remarks about the problem of INAPPROPRIATE MESSAGES are available at

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

in a general case like this ... where the plaintiff has to show proof of discrimination ... the burden is especially difficult there are some preliminaries of course ... if the women make more than the males ... then we would agree it would be "hard" to argue sex discrimination in terms of s

Re: On inappropriate hypothesis testing. Was: MIT Sexism & statistical bunk

On 12 Mar 2001 14:25:41 GMT, [EMAIL PROTECTED] (Radford Neal) wrote: [ snip, baseball game; etc. ] > In this context, all that matters is that there is a difference. As > explained in many previous posts by myself and others, it is NOT > appropriate in this context to do a significance test, an

Re: One tailed vs. Two tailed test

Will Hopkins wrote: > > At 7:34 PM + 12/3/01, Jerry Dallal wrote: > >Don't do one-tailed tests. > > If you are going to do any tests, it makes more sense to one-tailed > tests. If you're doing a 1 tailed test, why test at all? Just switch from standard treatment to the new one. Can't do

Re: One tailed vs. Two tailed test

In article , Will Hopkins <[EMAIL PROTECTED]> wrote: >At 7:34 PM + 12/3/01, Jerry Dallal wrote: >>Don't do one-tailed tests. >If you are going to do any tests, it makes more sense to one-tailed >tests. The resulting p value actually means something th

Re: One tailed vs. Two tailed test

dennis roberts wrote: > > we have to first separate out 2 things: > > 1. some test statistics are naturally (the way they work anyway) ONE sided > with respect to retain/reject decisions > > example: chi square test for independence ... we reject ONLY when chi > square is LARGER than some CV

Re: IRT/Rasch Modeling with SAS?

I use Bilog from SSI. Bilog can handle 1, 2, and 3-parameter model. I am not sure if it can accept 89 obs. Bilog has a Windows version. You can assemble the program by selecting options from the pull down menu.

how could i forget?

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applets

these are coming in fast and furious this morning ... perhaps a more summary listing in one place would be helpful ... here is what i have seen so far ... i am sure there are more http://www.kuleuven.ac.be/ucs/java/ http://www.stat.vt.edu/~sundar/java/applets/ http://www.ruf.rice.edu/~lane/st

Re: One tailed vs. Two tailed test

we have to first separate out 2 things: 1. some test statistics are naturally (the way they work anyway) ONE sided with respect to retain/reject decisions example: chi square test for independence ... we reject ONLY when chi square is LARGER than some CV ... to put a CV at the lower end of the