Specify the Rejection Region for the Wilcoxon Rank Sum Test $$n 1 = 7 , n _ { 2 } = 5 , \alpha = .05$$

Essay

Specify the rejection region for the Wilcoxon rank sum test in the following situation. $$n 1 = 7 , n _ { 2 } = 5 , \alpha = .05$$
$H _ { 0 }$ : Two probability distributions, 1 and 2 , are identical
$H _ { \mathrm { a } }$ : Probability distribution of population 1 is shifted to the right of the probability distribution for population 2