Question: Wall-Blues claims that its store brand of cough lozenge delivers soothing relief that lasts as long as the leading brand, Robinson’s. A sample of 71 Wall-Blues cough lozenges were tested and found to provide relief for 5.2 hours with a standard deviation s = 0.44 hours. A sample of 77 Robinson’s cough lozenges were also tested and found to provide relief for 5.8 hours with a standard deviation of s = 0.76 hours. We cannot assume that the population standard deviations are equal. At the .05 significance level, is there a difference in the number of hours of relief the two brands of cough lozenge provide?