2 Two drugs, I and II, for alleviating hay fever are trialled in a hospital on each of 12 volunteer patients. Each received drug I on one day and drug II on a different day. After receiving a drug, the number of times each patient sneezed over a period of one hour was noted. The results are given in the table.
| Patient | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Drug I | 11 | 34 | 19 | 16 | 10 | 29 | 6 | 17 | 20 | 13 | 4 | 25 |
| Drug II | 12 | 20 | 10 | 18 | 3 | 21 | 9 | 13 | 10 | 19 | 9 | 12 |
The patients may be considered to be a random sample of all hay fever sufferers.
A researcher believes that patients taking drug II sneeze less than patients taking drug I.
Test this belief using the Wilcoxon signed rank test at the \(5 \%\) significance level.