Question: Water witching, the practice of using the movements of a forked twig to locate underground water (or minerals), dates back over 400 years. Its first detailed description appears in Agricola's De re Metallica, published in 1556. That water witching works remains a belief widely held among rural people in Europe and throughout the Americas. [In 1960 the number of "active" water witches in the United States was estimated to be more than 20,000 (205).] Reliable evidence supporting or refuting water witching is hard to find. Personal accounts of isolated successes or failures tend to be strongly biased by the attitude of the observer. The following data show the outcomes of all the wells dug in Fence Lake, New Mexico, where 29 "witched" wells and 32 "nonwitched" wells were sunk. Recorded for each well was whether it proved to be successful (S) or unsuccessful (U). What would you conclude?