Toxin concentrations in fish by site
Toxin concentrations in fish by site
fish is a data frame with 16 observations on the following 2 variables.
sitea factor with levels A, B, C
and D
toxina numeric vector
fish2 is a data frame with 16 observations on the following 2
variables.
sitea factor with levels E, F, G
and H
toxina numeric vector
Prior to beginning mining operations a new precious metals mine had to run an extensive environmental study of the surrounding area, particularly down stream from their construction site. Thus, a baseline of data was collected over many years so that any environmental impact of the facility could be quantified. One step in the study was to collect fish along a stream and measure the amount of various toxins found in the fish.
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(fish)
dotplot(reorder(site, toxin) ~ toxin, fish, jitter.y = TRUE,
aspect = 0.3, xlab = "Amount of toxin (mg/kg wet weight)")
str(fish2)
dotplot(reorder(site, toxin) ~ toxin, fish2, jitter.y = TRUE,
aspect = 0.3, xlab = "Amount of toxin (mg/kg wet weight)")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.