ROBUST ROTATABLE CENTRAL COMPOSITE DESIGNS

Das [3] studied robust second order rotatable designs (RSORD) and constructed second order rotatable designs with correlated errors (SORDWCE) under the auto correlated structure using central composite design (RSORD) for 3 = v factors. In this paper, we extend the results of Das [3] for the construction of RSORD using central composite designs with correlated errors under the auto correlated structure and also obtained the variance of the estimated response for each factor for 17 3 ≤ ≤ v (v number of factors).