Spearman's Rank Correlation Coefficient (Edexcel A-Level Further Mathematics): Flashcards

For rankings, subjective judgments, or inconsistent raw scores

$r_s = 1 - \frac{6 \sum d^2}{n(n^2 - 1)}$

Difference in ranks

Agreement

Different concepts: 'no agreement' means $r_s \approx 0$; 'disagreement' means negative $r_s$

Use method for $r$ but input rankings

Transformation of data to make it easier to work with

$H = 100h$ and $L = l - 1000$