On a Special Subset Giving an Irregular Fractional Replicate of a 2N Factorial Experiment

Summary A special class of fractional replicates of 2n factorial experiments has been studied in this paper. Such fractional replicates are expected to be useful in practice where, for very large values of n, we may be interested only in the main effects. Analysis of such designs is simple in that the entire computational procedure is reducible to a simple routine.