thyroid.df {s20x}

Effect of a New Drug on Thyroid Weights

Description

Data from an experiment to asses the effect of a new drug on the weight of the thyroid gland using 16 laboratory animals. The animals were randomly assigned into either a control group, or a treatment group, and each animal had its bodyweight recorded at the beginning of the experiment and its thyroid weight measured at the end of the experiment.

Format

A data frame with 16 observations on 3 variables.

[,1]	thyroid	numeric	Weight of thyroid gland after 7 days (mg)
[,2]	body	numeric	Animal body weight before experiment began (g)
[,3]	group	factor	Animal's group (1 = control, 2 = drug)