A complex thing often has many factors that restrict and depend on each other. The purpose of analysis of variance (ANOVA for short) is to find out the factors that have a significant impact on this matter, the interaction between factors and the optimal level of significant factors through data analysis.

Regression analysis is a mathematical tool to study the correlation between one variable Y and several other variables X. It is based on a group of experimental or observation data to find the correlation between variables covered by randomness.

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