Statistical hypothesis testing method

Statistical hypothesis testing mainly includes two methods: T test and Z test. The details are as follows:

1, t test, also known as student t test, is mainly used for small sample size (such as n

2.z-test (U-test) is a method commonly used to test the mean difference of large samples (that is, the sample size is greater than 30). It uses the theory of standard normal distribution to infer the probability of difference, so as to compare whether the difference between the two averages is significant.

In addition to the above two main methods, there are F test and Chi-square test.