Learn in the textbookStatistical Analysis and Inference
DefinitionCorrelation analysis (相関分析) is an analysis method that uses the correlation coefficient (相関係数) and a scatter plot (散布図) to examine how closely two variables are related.
ExplanationYou first draw a scatter plot to see how the dots are arranged, then use the correlation coefficient to put the strength of the relationship into a number. The data are collected as pairs of values, such as the height and weight measured from the same person.