The Choice of the Number and Width of Classes for the Chi-Square Test of Goodness of Fit
卡方拟合优度检验中组数与组宽的选择
This article describes in non-mathematical fashion the technique suggested by H. B. Mann and A. Wald for selecting the number and width of class intervals for the chi-square test of goodness of fit when the null hypothesis distribution is continuous and completely specified. The number of classes is selected by means of a formula depending upon the sample size and the level of significance and the class limits are chosen such that each class contains the same number of items…