Hypothesis test: (the original hypothesis conforms to the distribution, the alternative hypothesis does not conform to the segment)
1) Establish the null hypothesis H0 (including the equal sign), the inverse proposition of H0 is H1, also called the alternative hypothesis
2) Select the test statistic (a conversion function constructed according to the mean value, variance and other properties)
3) Determine the rejection domain according to the significance level (generally 0.05)
4) Calculate the p-value or sample statistical value and make a judgment
