the rank sum test is an important non parametric statistical method that can be used to analyze experimental data in animal ecology. the application of this test is briefly described.
秩和检验法是非参数统计法中的一种重要方法,是对成组数据t检验的一个补充。
for the sake of getting more effective information, frequency spectrum analysis is applied to qualitatively analyze experimental data of inertia platform.