A study conducted by researchers was designed "to determine if application of duct tape is as effective as cryotherapy in the treatment of common warts." The researchers randomly divided 62 patients into two groups. The 31 patients in group 1 had their warts treated by applying duct tape. The 31 patients in group 2 had their warts treated by cryotherapy. Once the treatments were complete, it was determined that 55% of the patients in group 1 and 39% of the patients in group 2 had complete resolution of their warts. The researchers concluded that duct tape is significantly more effective in treating warts than cryotherapy. Complete parts (a) through (d) below.