Concepts of Hypothesis Testing

Concepts of Hypothesis Testing

假说检验的目的是利用样本来测试一个或者多个群体的参数值

Steps for Testing a Hypothesis

1.设定虚无假说(null hypothesis,H0H_0)和对立假说(alternative hypothesis,H1/HaH_1/H_a)

2.指定显著水准(level of significance,α\alpha)

3.决定适当的检定统计量(test statistic)

4.决定弃却域(rejection region)

5.下结论–推翻H0H_0/不推翻H0H_0(fail to reject H0H_0 )

说明

1.对立假说(alternative hypothesis,H1/HaH_1/H_a):研究者收集证据想要支持的假说

根据不同的H1H_1,我们可以将检定分为:

1.单尾检定(One-sided Test)

对立假设里面有‘</>’出现,‘<'出现在\rightarrow左尾假设–

Concepts of Hypothesis Testing