| bacteria {EngrExpt} | R Documentation |
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.”
A data frame with 50 observations on the following variable.
levelPeter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(bacteria)
qqmath(~ level, bacteria, aspect = 1,
xlab = "Standard normal quantiles",
ylab = "Bacteria count")