For questions 2-7: state the appropriate hypotheses; conduct ahypothesis test using ? = 0.05 utilizing the classical approach,confidence interval approach, or p-value approach; state thedecision regarding the hypotheses; and make a conclusion.
3. (15 pts) In a study of schizophrenia, researchers measuredthe activity of the enzyme monoamine oxidase (MAO) in the bloodplatelets of 18 patients. The results (expressed as nmolbenzylaldehyde product per 108 platelets) were as follows:
6.8 8.4 8.7 11.9 14.2 18.8
9.9 4.1 9.7 12.7 5.2 7.8 7.8
7.4 7.3 10.6 14.5 10.7
The researchers believe that the average MAO level should be 7.5amongst the general population, which is assumed to follow a normaldistribution. Elevated MAO levels are considered abnormal.
7. (15 pts) The manager of a fast-food restaurant claims thatthe average service time is less than 90 seconds. A random sampleof customers is selected and their wait times are reported asfollows:
56 78 66 78 99 114 106 92 45 102
119 84 88 118 99 61 55 79 108 46
75 102 70 74 72 113 83 78 105 81
