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 six weeks of treatments, the pain level of the patients was assessed with the following results:
Significant Reduction in Pain
Treatment Yes No Total
Biofeedback 560 440 1000
NSAID 680 320 1000
Total 1240 760 2000
Is there significant evidence (LaTeX: alpha=0.05α=0.05) of a difference in the two treatments relative to the proportions of patients who experienced a significant reduction in pain?