Spearman's rank correlation measures the strength and direction of the linear association between the ranks of two variables.

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Spearman's rank correlation coefficient is a non-parametric measure that assesses how well the relationship between two variables can be described using a monotonic function, focusing on the ranks rather than the raw data, which allows it to measure both linear and non-linear associations.

Spearman's Rank Correlation Measures the Strength and Direction of the Linear