On the Use of Ranges, Cross-Ranges and Extremes in Comparing Small Samples
利用极差、交叉极差与极值比较小样本
IN ORDER to simplify and reduce the arithmetical work involved in analyses of statistical quality control, attempts have been made to derive useful substitutes for the ordinary methods of comparing two samples. Among these, a mention may be made of the quotient of two ranges or two mean ranges as alternatives to the variance ratio in testing for homogeneity in variation. In a recent article [3] Paul R. Rider presents the distribution of the quotient of two sample ranges, the…