Doksum and Sievers (1976) describe an experiment involving the effect of ozone on weight gain of rats. The experimental group consisted of 22 rats which were placed in an ozone environment for seven days, while the control group contained 21 rats which were placed in an ozone-free environment for the same amount of time. The response was the weight gain in a rat over the time period.
A data frame with 45 observations on the following 2 variables.
indicator variable for treatment
response variable of weight gain
Hettmansperger, T.P. and McKean J.W. (2011), Robust Nonparametric Statistical Methods, 2nd ed., New York: Chapman-Hall.
Doksum, K. A. and Sievers, G. L. (1976), Plotting with confidence: Graphical comparisons of two populations, Biometrika, 63, 421-434.
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