On a negative note, you discovered that PHP has no native access to samplingdistributions, 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。
2
The included file, Distribution.php, contains methods that generate sampling-distribution statistics for several commonly used samplingdistributions (Student t, Fisher f, Chi Square).
Samplingdistributions of mean direction and resultant length were used to develop control charts respectively reflecting the central tendencies and positions of the Angle process.