Example 1.2.3: comparing two drugs with herds as experimental units

Change in packed cell volume (PCV, %) of seven animals in each of four herds; Berenil was given to two herds and Samorin to the other two, so herds are nested in drug (Table 1.2.3 and Appendix A of the book). New in version 2.0.0.

Usage

ex123

Format

A data frame with 28 rows and 3 variables:

herd

herd: 1 to 4.

drug

drug: Berenil or Samorin.

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

Examp2.3.2

Other VetResearchLMM data: ex121, ex122, ex124, ex125, ex126, ex127, ex31, ex32, ex33

Examples

str(ex123)
#> 'data.frame':	28 obs. of  3 variables:
#>  $ herd  : Factor w/ 4 levels "1","2","3","4": 1 1 1 1 1 1 1 2 2 2 ...
#>  $ drug  : Factor w/ 2 levels "Berenil","Samorin": 1 1 1 1 1 1 1 1 1 1 ...
#>  $ PCVdif: num  7.1 6.6 5.8 6.3 6.4 7 7.3 6.9 6.3 7.6 ...