On Second Order Slope Rotatable Designs under Intra-class Correlated Structure of Errors Using a Pair of Dissimilar Incomplete Block Designs
Sulochana Beeraka *
Department of Statistics, Acharya Nagarjuna University, Guntur-522510, India.
Re. Victor Babu Bejjam
Department of Statistics, Acharya Nagarjuna University, Guntur-522510, India.
*Author to whom correspondence should be addressed.
Abstract
In this paper, a study of second order slope rotatable designs under intra-class correlation error structure using two suitably chosen dissimilar incomplete block designs like balanced incomplete block designs and symmetrical unequal block arrangements with two unequal block sizes are suggested. Further, we study the variance of the estimated slopes for different values of the intra-class correlation coefficient (ρ) and the distance from the centre (d) for v factors are suggested. Some illustrative examples are also suggested.
Keywords: Second order response surface designs, intra-class correlated errors.