All Answers (7) No no need to standardize. Because by definition the correlation coefficient is independent of change of origin and scale. As such standardization will not alter the value of correlation.

Does correlation change if we normalize the data first?

Question: How would the correlations change if we normalized the data first? ... Correlations will not change, since data are normalized by computing.

Does scaling matter for correlation?

The strength of the linear association between two variables is quantified by the correlation coefficient. ... Since the formula for calculating the correlation coefficient standardizes the variables, changes in scale or units of measurement will not affect its value.