options(contrasts=c("contr.sum","contr.poly")) #sets deviation (or sum-to-zero) coding for definition of effects, use before running any anovas or regressions #import data#### library(car) #contains ...
Many of the questions we ask in science are about differences. Are the observed differences between our experimental groups due to chance or not? For instance, "how does soil pH vary with depth?", ...
Analysis of variance (ANOVA) is a usual way for analysing experiments. However, depending on the design and/or the analysis scheme, it can be a hard task. ExpDes, acronym for Experimental Designs, is ...
The goal of this short course is to first explain the services provided by the Laboratory for Interdisciplinary Statistical Analysis (LISA) and second to offer t-test and ANOVA (Analysis of Variance) ...
Analysis of variance (ANOVA) is the standard procedure for statistical inference in factorial designs. Typically, ANOVAs are executed using frequentist statistics, where p-values determine statistical ...
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Understanding the Basics of ANOVA and Dunnett’s 1-way ANOVA
When testing whether the means of more than 2 groups are statistically different, you could use a one-way ANOVA. But if you ...
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