The Hawk-Eye electronic system is used in tennis for displaying an instant replay that shows whether a ball is in bounds or out of bounds. In the first U.S. Open that used the Hawk-Eye system, players could challenge calls made by referees. The Hawk-Eye system was then used to confirm or overturn the referee’s call. Players made 839 challenges, and 327 of those challenges were successful with the call overturned (based on data reported in USA Today). Use a 0.01 significance level to test the claim that the proportion of challenges that are successful is greater than 1/3. What do the results suggest about the quality of the calls made by the referees?