Acute Postoperative Days. Referto Example 10.6 (page 482).

The researchers also obtained the following data on the number of acute postoperative days in the hospital using the dynamic and static systems.

Dynamic Static 7 588677 6 18 9 9 10 7 7 7 7 8 7 14 9 At the 5% significance level, do the data provide sufficient evidence to conclude that the mean number of acute postoperative days in the hospital is smaller with the dynamic system than with the static system? (Note: x¯1 = 7.36, s1 = 1.22, x¯2 = 10.50, and s2 = 4.59.)