Consider the following proposed determining function for the winning percentage of baseball teams WinPcti = 0.500 - 0.1 Team ERAi + 0.2 Team BAi + Ui, where Team ERA is the team earned run average, and Team BA is the team batting average. What is the effect (change) on winning percentage from an increase in Team ERA from 2.3 to 3.3?
A. 0.600
B. A decrease of 0.1 in winning percentage
C. 0.510
D. There is not enough information
Answer: B
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