#' Well characteristics
#'
#' Natural logarithms of specific capacity of wells in four rock types within
#' the Appalachian Mountain region of Pennsylvania.
#'
#'
#' @name AppalachianSpecCap
#' @docType data
#' @usage AppalachianSpecCap
#' @format Data frame with 200 rows and 2 columns\cr
#'\tabular{lll}{
#'Name \tab Type \tab Description\cr
#'LogSpecCap \tab numeric \tab Natural log of the specific capacity\cr
#'RockType \tab factor \tab Type of rock\cr }
#' @references
#'Helsel, D.R., and Hirsch, R.M., 2002, Statistical methods in
#'water resources: U.S. Geological Survey Techniques of Water-Resources
#'Investigations, book 4, chap. A3, 522 p.
#' @source Appendix C7 in Helsel and Hirsch (2002).
#' @keywords datasets
#' @examples
#'
#' data(AppalachianSpecCap)
#' # Create simple boxplots by Rock type
#' with(AppalachianSpecCap, boxplot(split(LogSpecCap, RockType), range=0))
NULL
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