The following data was collected in a clinical trial evaluating
4. The following data was collected in a clinical trial evaluating a new medication designed to improve wound healing in trauma patients. The new compound is compared against a placebo. After treatment for 10 days with the new compound or placebo the extent of wound healing is measured and the data are shown below.
Percent Wound Healing
Treatment 0-25% 26-50% 51-75% 76-100%
New psoriasis medication (n=125) 15 37 32 41
Placebo (n=125) 36 45 34 10
Is there a difference in the extent of wound healing by treatment? (Hint: Are treatment and the percent wound healing independent?) Run the appropriate test at a 5% level of significance.
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