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Question #9 (10%)~ A manager is thinking of providing, on a regular basis, in-house training for employees preparing for an inventory management certification exam. In the past, some employees received the in-house training before taking the exam, while others did not. Independent random samples selected from the company's records provided the following exam scores for 10 workers who did not receive in-house training and eight workers who did receive training. (The manager is confident that the distributions of both populations' exam scores are approximately normal.)~ No training Training 804 804 604 710 794 734 824 834 684 86- a. Compute the number of degrees of freedom.~ b. Develop a 95% confidence interval estimate for the difference between the average test scores for the two populations of employees.~ C. State your hypotheses. d. Using a= .05, test for any difference between the average test scores for the two populations of employees.~ e. Interpret your results.~