8 Residents of three towns \(A , B\) and \(C\) were asked to grade the reliability of their digital television signal as good, satisfactory or poor. A random sample of responses from each town is taken and the numbers in each category are given in the following table.
| Good | Satisfactory | Poor |
| Town \(A\) | 24 | 34 | 14 |
| Town \(B\) | 58 | 60 | 26 |
| Town \(C\) | 20 | 34 | 30 |
Test, at the 2.5\% significance level, whether grade of reliability is independent of town.
Identify which town makes the greatest contribution to the test statistic and relate your answer to the context of the question.