In a recent U.S. Open tennis tournament, among 20 of the calls challenged by the players, 8 were overturned after a review using an electronic system. Assume that when players
challenge calls, they are successful in having them overturned 50% of the time. The
probability that among 20 challenges, 8 or fewer are overturned is 0.252. Does this result
suggest that the success rate is less than 50%? Why or why not?

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The Answer of In a recent U.S. Open tennis tournament, among 20 of the calls challenged by the players, 8 were overturned after a review using an electronic system. Assume that when players
challenge calls, they are successful in having them overturned 50% of the time. The
probability that among 20 challenges, 8 or fewer are overturned is 0.252. Does this result
suggest that the success rate is less than 50%? Why or why not?

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