Example 1.2.2: comparing two doses of a drug in a randomised block design

Change in packed cell volume (PCV, %) one month after a low or high dose of Berenil, five animals per dose in each of three herds; the herds are blocks (Table 1.2.2 and Appendix A of the book). New in version 2.0.0.

Usage

ex122

Format

A data frame with 30 rows and 3 variables:

herd

herd (block): 1 to 3.

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

Examp2.3.2

Other VetResearchLMM data: ex121, ex123, ex124, ex125, ex126, ex127, ex31, ex32, ex33

Examples

str(ex122)
#> 'data.frame':	30 obs. of  3 variables:
#>  $ herd  : Factor w/ 3 levels "1","2","3": 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  0.9 2 2 2.2 2 7.4 6.8 7.1 6.7 7.9 ...