4 Three tutors each marked the coursework of five students. The marks are given in the table.
| Student | \(A\) | \(B\) | \(C\) | \(D\) | \(E\) |
| Tutor 1 | 73 | 67 | 60 | 48 | 39 |
| Tutor 2 | 62 | 50 | 61 | 76 | 65 |
| Tutor 3 | 42 | 50 | 63 | 54 | 71 |
- Calculate Spearman's rank correlation coefficient, \(r _ { \mathrm { s } }\), between the marks for tutors 1 and 2 .
- The values of \(r _ { \mathrm { s } }\) for the other pairs of tutors, are as follows.
$$\begin{array} { c c }
\text { Tutors } 1 \text { and 3: } & r _ { \mathrm { s } } = - 0.9
\text { Tutors } 2 \text { and 3: } & r _ { \mathrm { s } } = 0.3
\end{array}$$
State which two tutors differ most widely in their judgements. Give your reason.