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1·Methods On the basis of binormal model, maximum likelihood estimation was applied to areas calculation, and approximately normal method to confidence interval estimation and hypothesis test.

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。

2·Making use of two order statistics to construct a sample fonction for confidence interval estimation of the scale parameter, the probability density function of the sample function is discussed.

最近，对指数分布的参数和正态分布的位置参数讨论了基于残缺观测数据的区间估计”，‘’。

3·Business case estimation accuracy is usually very low, with the actual confidence interval often higher then 50%, as no detailed functional and project analysis is usually performed.

业务案例评估的精度经常很低，由于通常不能完成细节的功能分析，可信区间通常高达50%。

4·Meanwhile, by using interval estimation instead of the conventional point estimation, the lower and upper confidence limits, the confidence intervals of structure concrete strength are derived.

运用区间估计方法代替传统的点估计方法，导出结构混凝土强度的置信上限、下限和置信区间。

5·Objective: To introduce the methods for sample size estimation based on width of confidence interval.

目的：介绍基于置信区间宽度的样本含量估计方法。

6·Objective To study of the method of estimation of point and confidence interval of prevalence in the absence of patients number.

目的研究患病人数未知时患病率的点估计及区间估计方法。