ANOM (version 0.4.2)

waterfilter: Comparison of Water Filters

Description

Filtering performances of seven brands of water filters, measured as the number of bacterial colonies growing on each device.

Usage

data(waterfilter)

source

Hsu, J. C. (1984) Ranking and selection and multiple comparisons with the best. In: Santner, T. J. and Tamhane, A. C. (Editors) Design of Experiments: Ranking and Selection (Essays in Honor of Robert E. Bechhofer). Marcel Dekker, New York, NY, pp. 23--33.

Details

A high number of bacterial colonies on a filter corresponds to good performance of this particular device. Note that the dataset is unbalanced (n=2 for brands 4 and 7, n=3 for all other brands).

References

Westfall, P. H., Tobias, R. D., Wolfinger, R. D. (2011) Multiple Comparisons and Multiple Tests Using SAS, Second Edition. SAS Institute Inc., Cary, NC, pp. 592--593.

Examples

data(waterfilter)
str(waterfilter)