The Modified Latin Square
修正拉丁方设计
Summary The modified latin square design (semi-latin square) is described and discussed. The expectations of the mean squares are derived and, from these, the nature of the bias is developed. Empirical values of the bias are obtained from some corn uniformity data and found to be small. An unbiased estimator of the error of a comparison among treatments is obtained. A formula for obtaining the efficiency of the modified latin square relative to randomized blocks, using…