There are two ways to determine where to start an operation on a knee, either with a computer or manually. The data describes the pain experienced by the patients before and after the surgery.
A dataframe containing 50 observations. Column "pc" indicates if a computer was used (coded with "1") or not (coded with "0")
Sabeti-Aschraf, M., Dorotka, R., Goll, A., & Trieb, K. (2005). Extracorporeal shock wave therapy in the treatment of calcific tendinitis of the rotator cuff. The American journal of sports medicine, 33(9), 1365-1368.
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