Descriptive statistics: describe the distribution and basic characteristics of data by calculating the average, median, standard deviation and variance of data.
-Inference statistics: infer the properties of the whole data from the sample data, such as hypothesis test, confidence interval, etc.
-Regression analysis: used to study the relationship between two or more variables, such as linear regression and multiple regression.
-Analysis of variance: used to compare the average of three or more samples.
-Correlation analysis: used to study the relationship between two variables, such as Pearson correlation coefficient and Spearman rank correlation coefficient.