| Hu Chunyan,Hu Liangping,How to use χ2 test correctly——the analysis of a common risk difference for the data of a multiway table and the implementation of SAS software[J].SICHUAN MENTAL HEALTH,2021,34(4):308-313 |
| How to use χ2 test correctly——the analysis of a common risk difference for the data of a multiway table and the implementation of SAS software |
DOI：10.11886/scjsws20210719001 |
| English keywords:Common risk rate difference Confidence interval Hypothesis test Standard normal distribution |
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| The purpose of this article was to introduce the risk rate difference analysis method of the g×2×2 table data and the calculation method based on the SAS software. The tasks that needed to be completed included the following two terms： first， the point estimation of the common risk rate difference and its confidence interval estimation； second， the test "whether the common risk rate difference was equal to 0". Among them， there were a total of 6 approaches for achieving the aforementioned first task； and three approaches for achieving the aforementioned second task. Based on the SAS software and an example， the article realized the point estimation， the confidence interval estimation and the hypothesis test of the common risk rate difference， respectively. Next， the SAS output results were explained and the statistical and professional conclusions were made. |
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