bacteria {EngrExpt} | R Documentation |
Bacteria count in water samples
Description
As described in Nelson, Coffin and Copeland (2003), “Purified water is used in one step in the production of a medical device. The water is tested daily for bacteria. These data are the results from 50 days of testing. They are the counts of a particular strain of bacteria in a 100 ml. sample of water.”
Format
A data frame with 50 observations on the following variable.
level
bacteria count
References
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
Examples
str(bacteria)
qqmath(~ level, bacteria, aspect = 1,
xlab = "Standard normal quantiles",
ylab = "Bacteria count")
[Package EngrExpt version 0.1-8 Index]