假設檢驗的概念外文翻譯-其他專業(yè)-閱讀頁
2025-02-08 07:29本頁面
【正文】 ject a null hypothesis that is false. The probability of mitting a Type II error is called beta, and is often denoted by β. The probability of not mitting a Type II error is called 畢業(yè)設計（論文）外文文獻翻譯 6 the power of the test. Decision Rules The analysis plan includes decision rules for rejecting the null hypothesis. In practice, statisticians describe these decision rules in two ways with reference to a Pvalue or with reference to a region of acceptance. Pvalue. The strength of evidence in support of a null hypothesis is measured by the Pvalue. Suppose the test statistic is equal to S. The Pvalue is the probability of observing a test statistic as extreme as S, assuming the null hypothesis is true. If the Pvalue is less than the significance level, we reject the null hypothesis. Region of acceptance. The region of acceprance is a range of values. If the test statistic falls within the region of acceptance, the null hypothesis is not rejected. The region of acceptance is defined so that the chance of making a Type I error is equal to the significance level. The set of values outside the region of acceptance is called the region of rejection . If the test statistic falls within the region of rejection, the null hypothesis is rejected. In such cases, we say that the hypothesis has been rejected at the α level of significance. These approaches are equivalent. Some statistics texts use the Pvalue approach
高考資料相關推薦
鄂ICP備17016276號-1