Correlation is a unit less measure and it used often in statistics. It indicates both the intensity of the connection and its (direct or inverse) direction.
Correlation is a measure of association that tests whether a relationship exists between two variables. It indicates both the strength of the association and its direction (direct or inverse). The Pearson product-moment correlation coefficient, written as r, can describe a linear relationship between two variables.
Correlation is used to measure the linear relationship between two variables in statistics.
Correlation is one of the measures of association, which measures whether there is a relationship between two variables. A linear relationship between two variables can be represented by the Pearson correlation coefficient, written as r.
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