Researchers used 7 red and 7 black playing cards to randomly assign 14 volunteer males with high blood pressure to one of two diets for four weeks: a fish oil diet and a standard oil diet. These data are the reductions in diastolic blood pressure.
ex0112
A data frame with 14 observations on the following 2 variables.
reduction in diastolic blood pressure (in mm of mercury)
factor variable indicating the diet that the subject
followed, with levels "FishOil"
and "RegularOil"
Knapp, H.R. and FitzGerald, G.A. (1989). The Antihypertensive Effects of Fish Oil, New England Journal of Medicine 320: 1037--1043.