效力(power)
定义:指该检验能够正确的拒绝一个错误的虚无假设的概率。假设检验的效力反映了假设检验能够正确侦查到真实的处理效应的能力。
Definition: The probability that the test correctly rejects a false null hypothesis.The effectiveness of hypothesis testing reflects the ability of hypothesis testing to correctly detect the real processing effect.
效力表示为power=1-β
The power is expressed as power = 1-β
影响假设检验效力的因素主要有: Factors affecting the validity of hypothesis testing: 1.处理效应的大小(The size of the treatment effect); 2.显著性标准(Significance criterion); 3.检验的方向性(Directivity of the test); 4.样本容量(Sample size); 5.总体和样本的稳定性或误差大小(Stability or size of error for population and sample)