Re: Two sided test with the chi-square distribution?

Alan McLean <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > Rich Ulrich wrote: > > > > On Mon, 5 Feb 2001 19:26:46 +0900, "rjkim" <[EMAIL PROTECTED]> > > wrote: > > > > > hi, all. > > > > > > Isn't a chi-squre test inherently a 'one-sided sig. test'? > > >

power calculation for gene-environment interaction

Dear all: Is anybody aware of a sample size or power calculation for a continuous trait in gene-gene or gene-environment interaction in the literature? Thanks a lot, Jisheng. Jisheng Cui, Ph.D Research Fellow Centre for Genetic Epidemiology

Re: Excel Graphics

[EMAIL PROTECTED] wrote: > But Excel CAN produce simple scatter plots or bar charts. It is just that > the defaults are so horrible. With a lot of tweaking you can make them > My problem is cost. I want to get everyone in my department to have the > facility to produce reasonable charts that h

Recommend multiple regression text please

Hi, We are using a program called Fidap to do multiple regression on neuroimaging data. The problem is nobody here or where the program came from understands how to select coefficients, ie., whether and how to make them orthogonal. I am not very sophisticated statistically, but can muddle through

Re: statistics question

In article <95nuk5$8df$[EMAIL PROTECTED]>, [EMAIL PROTECTED] wrote: > Thanks very much for your helpful response. > 1) My factors are continous. I have multiple responses. Some are > continous and some are categorical. I need to optimize my resonses. > The main region that they are interested i

Re: Two sided test with the chi-square distribution?

Hi On Tue, 6 Feb 2001, Thom Baguley wrote: > Donald Burrill wrote: > > Well, it _might_ be. Depends on what hypothesis was being tested, > > doesn't it? And so far "rjkim" hasn't deigned to tell us that. > > Yes, though I think the vocabulary can obscure what goes on. To me a > "one-tailed" te

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Re: Two sided test with the chi-square distribution?

Bob Wheeler wrote: > Your point is a good one, but as a side issue, let > me object to the word "fudged." It implies > chicanery, which is not something that even Fisher > cared to imply. No one will ever know why Mendel's > results appear as they do, but It was not > necessarily with an intent

Re: The meaning of the p value

At 08:50 AM 2/2/01 -0500, Herman Rubin wrote: > >But this is not the case with fixing a p value. Most >testing problems have the property that the appropriate >procedure to be used corresponds to a p value for that >problem AND THAT SAMPLE SIZE, but the p value to be used >depends quite substanti

Re: Two sided test with the chi-square distribution?

Incorrectly? Would you please expand your thought. The only thing that might be called an error in his laws, that comes immediately to mind, is the fact that he didn't allow for the small problem of two genes being on the same chromosome -- but then he didn't know about chromosomes. Is this what y

Re: Two sided test with the chi-square distribution?

Donald Burrill wrote: > Well, it _might_ be. Depends on what hypothesis was being tested, > doesn't it? And so far "rjkim" hasn't deigned to tell us that. Yes, though I think the vocabulary can obscure what goes on. To me a "one-tailed" test should refer to the distribution to retain the meanin

Re: Two sided test with the chi-square distribution?

Rich Strauss wrote: > > Your point is well taken, and I didn't mean to imply dishonesty either -- > the term "fudged" was a poor choice, but I meant it in the sense of > manipulation or filtering, not necessarily conscious, and I mentioned that > it was an assertion. I don't see any re

Re: Missing data cell problem

Caroline Brown wrote: > > HI > > I have an analysis problem, which I am researching solutions to, and David > Howell of UVM suggested I mail the query to you. > My problem is how to deal with a two way- repeated measures design, > in which one cell could not be measured: >A1 A2 A3 > B1 ok

Re: convolution of binomials

In article , Alan Miller wrote: >Kumara Sastry wrote in message <[EMAIL PROTECTED]>... >>Suppose, X ~ Binomial(n1,p1), Y~Binomial(n2,p2) , and X and Y are >>independent. Also, Z = X+Y. Can anyone please comment on what the pdf >>of Z is? >>Thanks >>Kumara >Pr(Z