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The Complete Idiot's Guide to Statistics, 2nd Edition by Robert Donnelly

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Completely Randomized ANOVA

The simplest type of ANOVA is known as completely randomized one-way ANOVA, which involves an independent random selection of observations for each level of one factor. Now that’s a mouthful! To help explain this, let’s say I’m interested in comparing the effectiveness of three lawn fertilizers. Suppose I select 18 random patches of my precious lawn and apply either Fertilizer 1, 2, or 3 to each of them. After a week, I mow the patches and weigh the grass clippings.
def•i•ni•tion
The simplest type of ANOVA is known as completely randomized one-way ANOVA, which involves an independent random selection of observations for each level of one factor.
The factor in this example is fertilizer. There are three levels, ...

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