| sleep {datasets} | R Documentation |
Student's Sleep Data
Description
Data which show the effect of two soporific drugs (increase in hours of sleep compared to control) on 10 patients.
Usage
sleepFormat
A data frame with 20 observations on 2 variables.
| [, 1] | extra | numeric | increase in hours of sleep |
| [, 2] | group | factor | drug given |
Source
Cushny, A. R. and Peebles, A. R. (1905) The action of optical isomers: II hyoscines. The Journal of Physiology 32, 501–510.
Student (1908) The probable error of the mean. Biometrika, 6, 20.
References
Scheffé, Henry (1959) The Analysis of Variance. New York, NY: Wiley.
Examples
require(stats)
## Student's paired t-test
t.test(extra ~ group, data = sleep, paired = TRUE)