1. A drug manufacturer wishes to test whether its lotion is effective in helping to relieve the symptoms (itchiness, swelling) of a mosquito bite. The manufacturer conducts a randomized, double-blind trial of the drug. Participants were placed in two groups and both groups were given mosquito bites on their arm. Subjects in group 1 had the manufacturer's lotion rubbed on the bite while subjects in group 2 had a placebo lotion rubbed on the bite. Neither group knew whether their lotion contained the drug or a placebo. It was found that 71 of 102 subjects in group 1 reported an improvement in symptoms after applying the lotion while 55 of 99 subject in group 2 (those taking a placebo) reported an improvement in symptoms. a) Conduct all aspects of a hypothesis test to determine whether the drug is effective. Use a 1% level of significance b) After performing the test in part (a) of this question, suppose an error was made by the researcher. Which type would it be (I or II)