School of Statistics, Devi Ahilya University, Indore, India;
Balance; Incomplete; Block; Design; Symmetric; Balanced; Incomplete; Block; Design; Variance; Balanced; Design; Efficiency; Balanced; Design; Weighing; Design; Chemical; Balance; Weighing; Design; Optimum; Chemical; Balance; Weighing; Design; A-Optimal; Chemical; Balance; Weighing; Design;