Description
rats records the litter weights of pups from rats given three doses (control, low and high) of an experimental compound affecting reproductive performance.
Usage
rats
To load the file into ASReml-R and view the contents use the commands:
library(asreml)
data(package="asreml")
data("rats")
View(rats)
Format
| A data frame with 6 columns and 322 rows: | |
| Dose | A factor with 3 levels |
| Sex | A factor with 2 levels |
| littersize | A covariate |
| Dam | A factor with 27 levels |
| Pup | A factor with 18 levels |
| weight | Individual pup weights in grams |
Details
Thirty female rats (dams) were randomly split into three groups of 10 and each group randomly assigned a dosing level. Three litters had to be dropped from the high dose level.
References
Dempster AP, Patel CM, Selwyn MR and Roth AJ (1984). “Statistical and Computational Aspects of Mixed Model Analysis.” Journal of the Royal Statist. Series C., 33(2), pp. 203-214.