Remaining Time: 21 minutes, 05 seconds. Question Completion Status: 10 5 6 7 BL 10 11 12 13 14 150 17 18 QUESTION 10 What is the 95 percent confidence interval for the difference between the two population means (in hours per day)? (Use Department X - Department Y. Round your answers to two decimal places.) O (-7.86, '2.29" (0,53', '2.07) O (0.91 1.597 O (-18.79, '16.919 None of the other answers Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save and SubmitRemaining Time: 21 minutes, 45 seconds. Question Completion Status: 20 5 6 7 81 9 10 11 12 13 14 150 160 17 18 QUESTION 8 A research organization is studying the average time that individuals in two different departments of a large corporation spend on work-related tasks each day. Suppose that for a simple random sample of 45 employees in Department X, the mean time spent is 7.5 hours a day with a standard deviation of 1.8 hours. In an independent simple random sample of 50 employees in Department Y, the mean time spent is 6.2 hours a day with a standard deviation of 2.0 hours. What is the point estimate of the difference between the mean number of hours that Department X employees spend on work-related tasks per day and the mean number of hours that Department Y employees spend on work-related tasks per day? (Use Department X - Department Y) 1.30 O 1.60 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Arwen Save and SubmitRemaining Time: 21 minutes, 36 seconds. Question Completion Status: 6 7 11 12 13 14 150 160 17 18 day and the mean number of hours that Department Y employees spend on work-related tasks per day? (Use Department X - Department Y.) 1.30 O 1.60 O -1.30 O 0.59 O None of the other answers O 1.58 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save Al Answers Save andBlackboard