Contaminant concentrations in test and a control group.
Objective is to determine whether a test group has higher concentrations than a control group.
There are three detection limits, at 1, 2, and 5 ug/L. Used in Chapter 1, Table 1.1 of the NADA book.
data(Tbl1one)Helsel, Dennis R. (2005). Nondectects and Data Analysis; Statistics for censored environmental data. John Wiley and Sons, USA, NJ.