This is personal study note Copyright and original reference: https://www.youtube.com/watch?v=56__VRQLyqE&list=PLsri7w6p16vu3mMWzijxOmhrlvN23W04_&index=2 ================================================================================ Correlation analysis analyzed_correlation_between_variables=association_analysis(multiple_variables) ================================================================================ 2 variables: "advertisement price", "profit" "High advertisement price" then "high profit"? ================================================================================ Correlatioin analysis using scatter diagram ================================================================================ 2 variables: advertisement price, profit Create scatter plot of multiple 2D feature vector data Meaning - "advertisement price" increases, "profit" also increases - "2 variables" have "positive correlation relationship"