Pairwise Differences of Mean Outcomes Within Blocks
Calculates the differences of mean outcomes for multiple specified treatment factors and specified pairs of comparison levels, within the specified blocks.
withinBlockEffects(y, w, calcOptions)
a vector or matrix of outcomes.
a vector or matrix of assignments.
a list of options for calculating the difference of mean outcomes within blocks.
calcOptions$block should have the same length as
calcOptions$pairs defaults to
calcOptions$factors is specified, its length must equal the number of rows specified in
calcOptions$factors defaults to an appropriately-sized vector of
calcOptions$blockindex should have the same length as
A vector of differences of mean outcomes within blocks.
Joseph J. Lee and Tirthankar Dasgupta
Moore, David S., and George P. McCabe (1989). Introduction to the Practice of Statistics. Original source: study conducted by Jim Baumann and Leah Jones of the Purdue University Education Department.
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## Reading comprehension pre- and post-test example data(reading) withinBlockEffects(y = reading$Diff1, w = reading$Group, calcOptions = list(block = reading$Block, pairs=rbind(rbind(c("Basal","DRTA"),c("Basal","Strat"), c("DRTA","Strat")), rbind(c("Basal","DRTA"), c("Basal","Strat"),c("DRTA","Strat"))), blockindex=c(rep(1,3),rep(2,3))))