Question 5 a. b. Write the null and alternative hypothesis for the following and determine if it is a two- tailed, a left-tailed or a right-tailed test. A package of gum claims that the flavor lasts more than 39 minutes. i. ii. At the automobile manufacturing plant, there is a part that is supposed to weigh precisely 19 pounds. The engineers take a sample of parts and want to know if they meet the weight specifications. The mean score of the employees of a company in an annual training exercise is 58, with a standard deviation of 5. The manager wants to know if the scores have improved in the last training exercise. The scores of a sample of 60 employees revealed a mean score of 60. i. ii. Set up the hypothesis test. At the 0.01 level of significance, is there evidence to show that the employees' scores have improved?