R/bread.R

In ClustMC: Cluster-Based Multiple Comparisons

#' Loaf volumes from a bread-baking experiment
#'
#' Includes the volumes (ml) of 85 loaves of bread made under controlled
#' conditions from 100-gram batches of dough made with 17 different varieties of
#' wheat flour and 5 levels of potassium bromate (mg).
#'
#' Data from a bread-baking experiment by Larmour (1941). Later reproduced by
#' Scheffe (1959) and then used by Duncan (1965) to contrast different multiple
#' comparison methods. Jolliffe (1975) applies this dataset to illustrate his
#' cluster-based test.
#'
#' @format
#' A tibble with 85 rows and 3 columns:
#' \describe{
#'   \item{variety}{a factor indicating the variety of flour used.}
#'   \item{bromate}{a number denoting the amount of potassium bromate used
#'   (milligrams).}
#'   \item{volume}{a number denoting the volume of the loaf made under
#'   each condition (milliliters).}
#' }
#' @source Larmour, R. K. (1941). A comparison of hard red spring and hard red
#' winter wheats. \emph{Cereal Chemistry, 18}(6), 778-789. Available at:
#' <https://archive.org/details/sim_cereal-chemistry_1941-11_18_6>
#'
#' @references Duncan, D. B. (1965). A bayesian approach to multiple
#' comparisons. \emph{Technometrics, 7}(2), 171-222.
#' \doi{doi:10.2307/1266670}
#'
#' Jolliffe, I. T. (1975). Cluster analysis as a multiple comparison
#' method. \emph{Applied Statistics: Proceedings of Conference at Dalhousie
#' University, Halifax}, 159-168.
#'
#' Scheffe, H. (1950).\emph{The analysis of variance}. Wiley-Interscience
#' Publication.
#'
#' @examples
#' data(bread)
#' summary(bread)
"bread"