Question

For questions 2-7: state the appropriate hypotheses; conduct a hypothesis test using α = 0.05 utilizing the classical approach, confidence interval approach, or p-value approach; state the decision regarding the hypotheses; and make a conclusion.

3. (15 pts) In a study of schizophrenia, researchers measured the activity of the enzyme monoamine oxidase (MAO) in the blood platelets of 18 patients. The results (expressed as nmol benzylaldehyde 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 7.5 amongst the general population, which is assumed to follow a normal distribution. Elevated MAO levels are considered abnormal.

7. (15 pts) The manager of a fast-food restaurant claims that the average service time is less than 90 seconds. A random sample of customers is selected and their wait times are reported as follows:

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

Answer 1

Complete solution for first one with all three approaches.