| sleep {base} | R Documentation |
Students' Sleep Data
Description
Data which show the effect of two soporific drugs (increase in hours of sleep) on groups consisting of 10 patients each.
Usage
data(sleep)Format
A data frame with 20 observations on 2 variables.
| [, 1] | extra | numeric | increase in hours of sleep |
| [, 2] | group | factor | patient group |
Source
Student (1908) The probable error of the mean. Biometrika, 6, 20.