Example 1.2.4: two drugs at two doses with two sizes of experimental units

Change in packed cell volume (PCV, %) of animals in four herds: the drug is given to whole herds (two herds per drug) and the dose to animals within a herd (Table 1.2.4 and Appendix A of the book).

Usage

ex124

Format

A data frame with 40 rows and 4 variables:

herd

herd: 1 to 4 (nested in drug).

drug

drug: Berenil or Samorin.

dose

dose: h (high) or l (low).

PCVdif

change in PCV.

Source

Duchateau, L., Janssen, P. and Rowlands, G. J. (1998). Linear Mixed Models. An Introduction with Applications in Veterinary Research. International Livestock Research Institute, Nairobi. Appendix A.

See also

Examp1.3.2

Other VetResearchLMM data: ex121, ex122, ex123, ex125, ex126, ex127, ex31, ex32, ex33

Examples

str(ex124)
#> 'data.frame':	40 obs. of  4 variables:
#>  $ herd  : int  1 1 1 1 1 1 1 1 1 1 ...
#>  $ drug  : Factor w/ 2 levels "Berenil","Samorin": 1 1 1 1 1 1 1 1 1 1 ...
#>  $ dose  : Factor w/ 2 levels "h","l": 2 2 2 2 2 1 1 1 1 1 ...
#>  $ PCVdif: num  2.5 1.6 3.5 2.6 2.8 6.9 6.8 7.2 5.9 6.5 ...