How is correlation measured?
Mathematics for Programming > Statistics > Correlation
230
Answer:
Correlation is typically measured using a correlation coefficient, which is a numerical value that indicates the strength and direction of the relationship between two variables. The most commonly used correlation coefficient is Pearson's correlation coefficient, which ranges from -1 to +1. A correlation coefficient of +1 indicates a perfect positive correlation, meaning that the two variables move in the same direction together. A correlation coefficient of -1 indicates a perfect negative correlation, meaning that the two variables move in opposite directions. A correlation coefficient of 0 indicates no correlation, meaning that there is no relationship between the two variables. Other types of correlation coefficients, such as Spearman's rho and Kendall's tau, can be used to measure the correlation between variables that do not have a linear relationship.
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