Ten wireless earbud models—Aurora (A), Borealis (B), Comet (C), Drift (D), Echo (E), Flare (F), Glide (G), Halo (H), Ion (I), and Jolt (J)—are evaluated by two tech publications, 'AudioPhile' and 'TechTrend'. Each publication ranks the earbuds from 1 (best) to 10 (worst).
| Rank | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| AudioPhile | C | A | G | D | B | H | F | J | I | E |
| TechTrend | D | C | H | A | G | B | J | F | E | I |
Calculate Spearman’s rank correlation coefficient for these data.
Stating your hypotheses clearly, test at the 5% level of significance whether or not there is a positive correlation between the rankings of the two publications.
Practise Edexcel A Level Maths Regression, Correlation and Hypothesis Testing with exam-style questions for A Level Maths. 202 questions covering Exponential Models, Measuring Correlation, and Hypothesis Testing for Zero Correlation, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
