On a negative note, you discovered that PHP has no native access to sampling distributions, which is a requirement for implementing most statistical tests.
不利的一面，您发现PHP对于取样分布缺乏内在手段，而这是实现大多数统计测试所必需的。
The included file, Distribution.php, contains methods that generate sampling-distribution statistics for several commonly used sampling distributions (Student t, Fisher f, Chi Square).
所包含的文件Distribution . php包含了为几个常用的抽样分布(t分布、f分布和X平方分布)生成抽样分布统计信息的方法。
Sampling distributions of mean direction and resultant length were used to develop control charts respectively reflecting the central tendencies and positions of the Angle process.
基于平均方向和合向量长度的抽样分布，研究反映角度过程集中程度的合向量长度控制图和反映角度过程集中位置的平均方向控制图。
In explicit UPDATE STATISTICS operations in MEDIUM mode, a new SAMPLING SIZE option in the resolution clause specifies the minimum number of rows to sample for column distributions.
在使用MEDIUM模式的显式的UPDATESTATISTICS操作中，可以在resolution子句中使用新的SAMPLINGSIZE选项为列分布抽样指定最小行数。
In explicit UPDATE STATISTICS operations in MEDIUM mode, a new SAMPLING SIZE option in the Resolution clause can specify the minimum number of rows to sample for column distributions.
在MEDIUM模式的显式的UPDATESTATISTICS操作中，resolution子句中新的SAMPLINGSIZE选项可以指定列分布进行抽样的最少行数。
It typically USES random number 5 generators to generate multiple scenarios of a model by repeatedly sampling values from the probability distributions for the uncertain variables.
它使用随机数5生成器通过重复地根据不确定变量的概率分布采样来生成模型的多重情境。
Under the same amplitude modulation index and same frequency modulation index, different SVM waveforms can be derived from different sampling point distributions.
相同频率调制比和幅度调制比的情况下，对调制波信号的不同采样点分布可以得到不同的SVM波形。
This paper gives a statistical method of working out reliability sampling inspection plans for items whose failure times are distributed as exponential distributions.
本文给出了制订定时截尾下指数分布产品可靠性抽样检验方案的统计方法。
Its growth status and distributions in Zhuhai City were studied by route survey and plot and line transect sampling.
结合线路调查、样方调查和样带调查法，分析研究了珠海市水松林的分布现状和发展趋势。
Its growth status and distributions in Zhuhai City were studied by route survey and plot and line transect sampling.
结合线路调查、样方调查和样带调查法，分析研究了珠海市水松林的分布现状和发展趋势。
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