Chapter 1, Problem 43SE

Copper Bracelets (Example $7$ ) Some people believe that wearing copper bracelets is a good treatment for arthritis of the hand. To test this belief, suppose you recruit $100$ people and supplv them all with copper bracelets. After the patients wear the bracelets for a month, you ask them whether or not their pain is less than it was before they began wearing the bracelets. Explain how to . prove this study.