Re: Post-hoc comparisons

2001-03-02 Thread Rich Ulrich
On 2 Mar 2001 07:27:16 -0800, [EMAIL PROTECTED] (Esa M. Rantanen) wrote: [ snip, detail ] > contingency table. I have used a Chi-Sq. analysis to determine if there is > a statisitcally significant difference between the (treatment) groups (all > 4!), and indeed there is. I assume, however, tha

Re: Post-hoc comparisons

2001-03-02 Thread Donald Burrill
Hi, Esa! You've had a couple of responses; here's another. You state "pairwise comparisons"; but it strikes me as at least possible that you might want (or might _also_ want) to consider more complex comparisons if any such comparisons seemed to offer a more parsimonious (or

Re: Post-hoc comparisons

2001-03-02 Thread Paul R Swank
At 08:43 AM 3/2/01 -0600, Esa M. Rantanen wrote: >Dear All: > >I have a question concerning pairwise comparisons between four treatment >conditions. My experience is mostly with ANOVA, and (I think!) I can >understand the reasoning for the use of multiple comparison procedures >(e.g., Duncan's, Tu

Re: Post-hoc comparisons

2001-03-02 Thread William B. Ware
It sounds to me like are are dealing with a comparison of four proportions... Why can't you follow up the initial test with the six pairwise tests of proportions, using some type of Bonferroni correction... There's the Holm modification and the FDR procedure, both of which give adequate protection

Post-hoc comparisons

2001-03-02 Thread Esa M. Rantanen
Dear All: I have a question concerning pairwise comparisons between four treatment conditions. My experience is mostly with ANOVA, and (I think!) I can understand the reasoning for the use of multiple comparison procedures (e.g., Duncan's, Tukey's, or LSD) instead of individual t-tests between c