3. [4 marks} Chapter 6. Example 9 in the textbook {39'1" or 10* edition} discusses a matched pairs experiment to compare the effectiveness of two different insect repellents. a. Whofwhat were the pairs in this experiment?I h. Why was the arm for the repellants chosen randomly each time':I Specically, address what issue would arise if we did not do this randomly. Use one or two sentences. Assignment 3, STAT l Dl Fall 2(121, SFU c. Explain, in the contest of this study. the benefit of conducting the experiment using matched pairs instead of as a completely randomized design. Use one or two sentences. d. Suppose the researchers find that the eet repellant is significantly more eectiye than the eucalyptus re pellant. How would you describe this result to a non-statistician? Use one or two sentences