1. A clinical trial is conducted comparing a new pain medication for arthritis. Participants are randomly assigned to receive the new medication or a placebo. The outcome is pain relief within 30 minutes. The data are shown below.
Pain Relief No Pain Relief
New Medication 44 76
Placebo 21 99
Estimate the risk difference in pain relief between treatments=Estimate the relative risk in pain relief between treatments=Estimate the odds ratio in pain relief between treatments