trtools: Miscellaneous Tools for Teaching Statistics

#' Effects of storage temperature and force on producing embryogenic anthers.  
#'
#' Data from an experiment investigating the effects of storage temperature and centrifuge force on obtaining embryogenic anthers from \emph{Datura innoxia}. Each anther was stored for 48 hours in either normal or cold (3 degrees celsius) temperatures, and were then subjected to one of three levels of force in a centrifuge.
#'
#' @format A data frame with 6 observations and four variables:
#' \describe{
#'    \item{storage:}{storage temperature of anthers (control or cold)}
#'    \item{force:}{force (g) from the centrifuge}
#'    \item{y:}{number of embryogenic anthers}
#'    \item{n:}{total number of anthers}
#' }
#'
#' @note These data are originally from Sangwan-Norrell (1977) and are featured in Wood (1978) and Dobson and Barnett (2008). 
#'
#' @source Dobson, A. J. & Barnett, A. G. (2008). \emph{An introduction to generalized linear models} (3rd Edition). Boca Raton, FL: CRC Press.
#' 
#' Sangwan-Norrell, B. S. (1977). Androgenic stimulating factors in the anther and isolated pollen grain culture of \emph{Datura innoxia} Mill. \emph{Journal of Experimental Botany}, \emph{28}, 843-852.
#' 
#' Wood, C. L. (1978). Comparison of linear trends in binomial proportions. \emph{Biometrics}, \emph{34}, 496-504. 
"anthers"