7.9 PRACTICE PROBLEMS 1. Data are collected in a clinical trial evaluating a new compound designed to improve wound healing in trauma patients. The new compound is compared against a placebo. After treatment for 5 days with the new compound or placebo, the extent of wound hcal- ing is measured and the data are shown in Table 7-6. Is there a difference in the extent of wound healing by TABLE 7-6 Data for Practice Problems 1 and 2 Percent Wound Healing Treatment 26-5046 51-75%% 76-1004% New compound [n = 125) 15 37 32 41 (# = 125)