openintro (version 1.7.1)

mammogram: Experiment with Mammogram Randomized

Description

An experiment where 89,835 women were randomized to either get a mammogram or a non-mammogram breast screening. The response measured was whether they had died from breast cancer within 25 years.

Usage

data("mammogram")

Format

A data frame with 89835 observations on the following 2 variables.

treatment

a factor with levels control mammogram

breast_cancer_death

a factor with levels no yes

Examples

# NOT RUN {
data(mammogram)
table(mammogram)
chisq.test(table(mammogram))
# }