test statistic短语¹⁴⁴⁹⁷²⁺² 基本例句 检验统计量 Results By the iterative procedure, ML estimation and standard errors of ROC curve parameters a and b, ROC- area index Az were obtained and hypothesis test statistic U value could be calculated. 方法在双正态模型基础下应用 ML估计方法计算 ROC曲线下面积，正态近似法估计面积的可信区间及假设检验。 dictall