MDCu {NADA}

Copper in ground water from of San Joaquin Valley, USA

Description

Copper concentrations in ground water from the Alluvial Fan zone in the San Joaquin Valley of California. One observation was altered to become a <21, larger than all of the detected observations (the largest detected observation is a 20).

Objective is to calculate summary statistics when the largest observation is censored.

There are five detection limits, at 1, 2, 5, 10 and 20 ug/L. An additional artificial detection limit of 21 was added to illustrate a point. Used in Chapter 6 of the NADA book.

Usage

data(MDCu)

Source

Millard and Deverel, 1988, Water Resources Research 24, pp. 2087-2098.

References

Helsel, Dennis R. (2005). Nondectects and Data Analysis; Statistics for censored environmental data. John Wiley and Sons, USA, NJ.