| Hu Liangping,How to use Z test correctly——the basic concepts and the preconditions of the Z test[J].SICHUAN MENTAL HEALTH,2020,33(5):418-421 |
| How to use Z test correctly——the basic concepts and the preconditions of the Z test |
DOI：10.11886/scjsws20200916003 |
| English keywords:Z test Probability density function Distributional function Normal distribution Linear parametric statistical model |
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| English abstract: |
| The purpose of this article was to briefly introduce the basic concepts and the theoretical fundamentals related to the Z test. The basic concepts involved to five contents as follows： Firstly， what is the Z test； Secondly， what is normal distribution； Thirdly， the preconditions of the Z test； Fourth， the occasion applicable of the Z test； Fifth， the occasion applicable of the Z quantile. The theoretical fundamentals were concerned with the following two aspects： one was the relationships between the normal distribution and the other probability distributions， the other was that the normal distribution could be applied to the approximate calculation for the other probability distributions. |
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