- 25 Marks
QMDM – APR 2024 – L2 – Q3 – Spearman’s Rank Correlation in Employee Aptitude and Interview Ranking
Using data on aptitude scores and interview rankings for 10 employees at a community bank, state when Spearman's rank correlation is suitable, calculate a suitable correlation measure, and comment on the result.
Question
Mumuadu Community Bank Ltd’s Personnel Department now has records on ten (10) recent employees that give an aptitude score and an interview ranking, as displayed below:
| Employee | Aptitude Score | Interview Ranking |
|---|---|---|
| A | 38 | 10 |
| B | 59 | 5 |
| C | 68 | 8 |
| D | 40 | 7 |
| E | 14 | 9 |
| F | 33 | 1 |
| G | 87 | 2 |
| H | 71 | 3 |
| I | 62 | 3 |
| J | 81 | 6 |
(a) State the situation under which the Spearman’s Rank Correlation Coefficient is a suitable measure of correlation.
(b) Determine a suitable measure of correlation
(c) Comment on your correlation value in (b) above
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