#' Multigroup data
#' Simulated dataset following the mglrm for two groups.
#' @docType data
#' @usage data(simdata_2mglrm)
#' @format A data frame with 4000 respondents allocated equally to two groups via indicator
#' variable S. They face a test of 20 items Y of which the first 18 are binary and the last two
#' are ordinal with 4 categories. Three covariates X are generated from a multivariate normal
#' distribution, where the variables each have a mean of 0, unit variance and pairwise
#' correlations equal to 0.5. X1 is transformed into a binary variable with a split value of 0.
#' The corresponding parameters of the population model including an intercept are set to
#' \eqn{\gamma_1=(-0.5,0.2,0.2,-0.5)'}, \eqn{\gamma_2=(1,0.4,-0.2,-0.7)'},
#' \eqn{\sigma^2_1=0.5^2} and \eqn{\sigma^2_2=0.6^2}. 5 percent of the observations in Y18,
#' Y20, X1 and X2 are deleted completely at random.
jcgaasch/LaRA documentation built on Dec. 20, 2017, 12:19 p.m.