6 A Wilcoxon rank-sum test with samples of sizes 11 and 12 is carried out.
- What is the least possible value of the test statistic \(W\) ?
- The null hypothesis is that the two samples came from identical populations. Given that the null hypothesis was rejected at the \(1 \%\) level using a 2 -tail test, find the set of possible values of \(W\).