When there is a perfect negative rank correlation between two variables, the value of the test statistic rs in Spearman's test is -1.

Name: When there is a perfect negative rank correlation between two variables, the value of the test statistic rs in Spearman's test is -1.
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A perfect negative rank correlation means that as one variable increases, the other decreases in a perfectly linear fashion, resulting in an rs value of -1 in Spearman's rank correlation test.

When There Is a Perfect Negative Rank Correlation Between Two