1. What type of educational background do CEOs have? Twenty years ago, 27% of CEO's had MBAs. In a current survey, 344 CEOs of medium and large companies were asked whether they had an MBA degree. There were 97 MBAs. Conduct a hypothesis test with a = 0.05 to determine if the number of MBAs had increased from 20 years ago. Complete all steps of a hypothesis test.
2. A human resources manager for a car company wanted to know whether production line workers have more days absent than office workers. He took a random sample of eight workers from each category and recorded the number of days absent the previous year. Can we infer that there is a difference in days absent between the two groups of workers?

Production line workers: 4 0 6 8 3 11 13 5

Office workers: 9 2 7 1 4 7 9 8