Approaches to analyzing experiments with factorial arrangements of treatments plus other treatments

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Abstract

Experiments with factorial arrangements of treatments plus one or more other treatment(s) are sometimes analyzed with a one-way analysis of variance (ANOVA) and means are separated with a multiple comparison. A set of single degree-of-freedom contrasts in a one-way ANOVA, provides formal tests for main effects and interactions. Data from a 2 × 3 factorial experiment that also contained a control were analyzed with a one-way ANOVA with a multiple comparison. Results from this analysis were compared to results obtained from a two-way ANOVA, a one-way ANOVA with pre-planned contrasts, a two-way ANOVA with least squares means comparisons obtained with SAS/general linear models procedure, and a regression model with an indicator variable and random blocks obtained with SAS/Mixed procedure. Results and interpretation differed depending on how the data were analyzed and these differences are discussed.

Original languageEnglish (US)
Pages (from-to)117-120
Number of pages4
JournalHortscience: A Publication of the American Society for Hortcultural Science
Volume38
Issue number1
StatePublished - Feb 2003

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analysis of variance
least squares
linear models
testing

All Science Journal Classification (ASJC) codes

  • Horticulture
  • Plant Science

Cite this

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