Biofeedback is a treatment technique in which people are trained to improve their health by using signals from their own bodies. Specialists in many different fields use biofeedback to help their patients cope with pain. A study was conducted to compare a biofeedback treatment for chronic pain with an NSAID medical treatment. A group of 2,000 newly diagnosed chronic pain patients were randomly assigned to receive to one of the two treatments. After 6 weeks of treatments, the pain levels of the patients were assessed with the following results: Significant Reduction in Pain Treatment Yes No Total Biofeedback 560 440 1,000 NSAID 680 320 1,000 Total 1,240 760 2,000 Let T1 = proportion of all patients who have the biofeedback treatment and experience a significant reduction and let T2 = proportion of all patients who have the NSAID treatment and experience a significant reduction in pain. We are interested in testing