C. Solve the problems by following the steps and procedures in hypothesis testing. 1. An automobile manufacturer states that the mean kilometer per liter (kpl) for one of its new full- sized models is 15. Sixty cars of this model were randomly selected and the number of kilometers per liter consumed was recorded for each. The sample mean is 14.5 kpl with a standard deviation of 1.5. Do the data present sufficient evidence to indicate that the mean kpl for this model is more than 15? Use 0.01 level of significance. 2. Job satisfaction as a function of work schedule was investigated in two different factories. In the first factory, the employees are on fixed shift system while the second factory, the workers have rotating shift system. Using the data in the table below, determine if there is a significant difference in job satisfaction between the two groups of workers. Use a = 0.01 Work Schedule S n Fixed Shift 7.27 3.15 38 Rotating Shift 6.12 3.02 40