Question: Preliminary analyses indicate that you can consider the assumptions for using nonpooled t-procedures satisfied. Researchers obtained the following data on the number of acute postoperative

Preliminary analyses indicate that you can consider the assumptions for using nonpooled t-procedures satisfied. Researchers obtained the following data on the number of acute postoperative days in the hospital using the dynamic and static systems. Obtain a 95% confidence interval for the difference, j1, 15, between the mean numbers of acute postoperative days in the hospital with the dynamic and static systems. (Note: x =7.75, 8, = 1.86, Xo = 10.00, and s4 = 2.90) Dynamic 10 9 8 7 10 7 8 7 9 5 Static (in) 8 13. 14 The 95% confidence interval is from to [ } (Round to three decimal places as needed.)

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