ANOVA and Pseudoreplication in R
On Fri, Feb 25, 2011 at 9:08 AM, Ben Ward<benjamin.ward at bathspa.org> wrote:
[Much snippage] The Lineage (bottle) is also a factor then, with 5 levels (1,2,3,4,5). Because they may be different. Then when the zones have appeared after a day or 2. I take 4 diameter measurements from each zone, across the zone at different angles, to take account for the fact, that there may be a weird shape, or not quite circular. I'm concerned about pseudoreplication, such as the multiple readings from one disk, and the 5 lineages - which might be different from one another in each of the Two "EV." treatments, but not with "NE." treatments.
Why not plot the results and see if there _are_ differences across your four readings, and your five lineages within each arm. Then read: http://lme4.r-forge.r-project.org/book/Ch2.pdf