Tasting experiment that compared four apple varieties

Description

Each of 20 tasters each assessed three out of the four varieties. The experiment was conducted according to a balanced incomplete block design.

Usage

data(appletaste)

Format

A data frame with 60 observations on the following 3 variables.

aftertaste

a numeric vector

Apple samples were rated for aftertaste, by making a mark on a continuous scale that ranged from 0 (extreme dislike) to 150 (like very much).

panelist

a factor with levels a b c d e f g h i j k l m n o p q r s t

product

a factor with levels 298 493 649 937

Examples

data(appletaste)
appletaste.aov <- aov(aftertaste ~ panelist + product, data=appletaste)
termplot(appletaste.aov)