split-plot

  1. S

    split-split plot with continuous subplot variable

    Hello I am trying to analyze data from a split-split-plot design. The sub-plot is a continuous factor and since we suspect a non-linear relationship, the quadratic form needs to be tested as well. Factors: a-main plot-5 levels b-subplot-continuous c-sub-subplot-2 levels. To test the quadratic...
  2. S

    2x2x3 ANOVA interaction and error term formulas?

    Hey guys, I would really appreciate some help with some ANOVA formulas. :) So I'm running a 2 (between) by 2 (between) by 3 (within) design and I want to run some ANOVAs by hand to (a) double-check the SPSS output and (b) have some more control over which error term is used. Really, I have...
  3. J

    split-plot design and lme

    I’m working on a data set in order to evaluate the impact of drying on sediment microbial activities. The objective is to determine if the impact of drying varies among sediment types and/or depth within the sediment. The experimental design is as follows: The first factor Sediment...
  4. J

    Error bars and split-plot design

    I have the following experimental design : Sampling is carried out on three random sites (Factor Site is coded : Site1, Site2, Site3). Within each site, sampling is carried out in a dry plot and in a wet plot (Factor Hydrology is coded : Dry/Wet) Within each of the previous plot, sampling is...
  5. P

    ANOVA Design and Analysis

    Hello, This is my first post so I hope my question is appropriate for the group. I have performed an experiment where we have blood samples from 18 donors (subjects). The blood from each subject is split in 2 and subjected to a treatment (factor A, 2 levels). Each of these samples is...