The example in this section tested the null hypothesis that red and yellow M&M plain candies have

Question:

The example in this section tested the null hypothesis that red and yellow M&M plain candies have weights with identical populations. Refer to Data Set 11 in Appendix B and test the claim that red and brown M&M plain candies have weights with identical populations. Use a 0.05 level of significance.
Use the Wilcoxon rank-sum test.