2. The data set that represents the level of effectiveness of two (2) types of drugs that were administered to 30 people is shown. 15 people took a new drug and another 15 people took aspirin. The following scale measures the effectiveness of drugs: 5 = extremely effective, 4 = quite effective, 3 = somewhat effective, 2 = slightly effective, 1 = not at all effective. (Xm21-02) Is there a significant difference between the levels of effectiveness of both drugs?