I am planning a 2x2 factorial experiment whe
Dear list members,
I am planning a 2x2 factorial experiment where I record several response
variables to test several hypotheses.
Some of these hypotheses can be tested using the usual 2-way ANOVA. That is,
the
significance or non significance of th
To: ECOLOG-L@LISTSERV.UMD.EDU
Subject: [ECOLOG-L] planned contrasts replacing 2-way ANOVA
I am planning a 2x2 factorial experiment whe
Dear list members,
I am planning a 2x2 factorial experiment where I record several response
variables to test several hypotheses.
Some of these hypotheses can be
There should be no problem with using a priori contrasts. No
adjustment of the p-value is required, UNLESS the contrasts are
non-orthogonal, which is often the case when more than two hypothesis
tests. If the contrasts are not orthogonal, some type of adjustment
(e.g. Bonferroni) is requi