An experiment measuring the glycogen content in rat livers that uses subsampling.
A data frame with 36 rows and 4 variables:
A numeric treatment group indicator (1, 2, 3).
Rat identification number. The numbers are not unique; each treatment has a rat numbered 1 and 2, but these not the same rats (rats are nested under treatment).
A numeric variable indicating the liver piece. Each liver was divided into three pieces.
Six rats were randomised to three treatment conditions (two per condition). Their livers were divided into three pieces and two measurements were taken on each piece for 6 x 3 x 2 = 36 observations. The rats are the experimental units and there are two levels of subsampling.
Sokal RR and Rohlf FJ (1995). Biometry. WH Freeman and Co., New York, NY.
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