Zinc concentrations of the CuZn data set; concentrations in the Alluvial Fan zone have been altered so that there are more nondetects. This produces a greater signal, even with more nondetects.
Objective is to determine if zinc concentrations differ between the two zones. Zinc has two detection limits, at 3 and 10 ug/L. Used in Chapter 9 of the NADA book.
data(CuZnAlt)Helsel, Dennis R. (2005). Nondectects and Data Analysis; Statistics for censored environmental data. John Wiley and Sons, USA, NJ.