dioxin {isdals}

dioxin in water

Description

Over a period of 14 years from 1990 to 2003, environmental agencies monitored the average amount of dioxins found in the liver of crabs at two different monitoring stations located some distance apart from a closed paper pulp mill. The outcome is the average total equivalent dose (TEQ), which is a summary measure of different forms of dioxins with different toxicities found in the crabs

Usage

data(dioxin)

Format

A data frame with 28 observations on the following 3 variables.

site

a factor with levels a b corresponding to the two monitoring stations

year

the year

TEQ

a numeric vector for the total equivalent dose

Source

C. J. Schwarz (2013). Sampling, Regression, Experimental Design and Analysis for Environmental Scientists, Biologists, and Resource Managers. Course Notes.

Examples

data(dioxin)
## maybe str(dioxin) ; plot(dioxin) ...