时间序列分析和统计检验提供了优化地下水位监测频率的定量标准。
Time series analysis and statistical test provide quantitative criteria to determine the optimum observation frequency.
给出了正态总体均值和标准差的最大似然估计（M LE），似然比检验统计量及其渐近分布等结果。
The maximum likelihood estimators(MLE) of means and standard deviations, and the asymptotic distribution of likelihood ratio statistic were given.
方法以评价标准，对50例大腿截肢患者的运动疗法前后进行评定，并加以统计学检验。
Method 50 patients with above knee amputation were evaluated with FIM scale before and after physical therapy and the result will be examined by statistics.
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