Sleep Data
The data in the file sleep.dat
consists of the various measures regarding sleep and other
factors for a variety of mammals.
The variables
are:
- Species of animal
- Body weight (kg)
- Brain weight (g)
- Hours/day of non-dreaming sleep
- Hours/day of dreaming sleep
- Total hours/day of sleep
- Maximum life span in years
- Gestation time in days
- Predator Index, from 1 to 5 with 5 be most likely to be preyed
upon
- Sleep exposure index, from 1 to 5 with 5 being the most exposed
- Overall danger index, from 1 to 5 with 5 being in the most danger
Missing values for all of the variables are represented by -999.0.
Source:
http://lib.stat.cmu.edu/datasets/sleep
originally presented in Allison, Truett and Cicchetti, Domenic V. (1976), "Sleep in Mammals:
Ecological and Constitutional Correlates", Science, November 12,
vol. 194, pp. 732-734.