This dataset was used by Helsel and Cohn (1988) to verify their software. It is provided for code validation purposes.
data(Silver)A list containing 56 observations with items 'obs' and 'censored'. 'obs' is a numeric vector of all observations (both censored and uncensored). 'censored' is a logical vector indicating where an element of 'obs' is censored (a less-than value).
Dennis R. Helsel and Timothy A. Cohn (1988), Estimation of descriptive statistics for multiply censored water quality data, Water Resources Research vol. 24, no. 12, pp.1997-2004