Consider the following proposed determining function for the winning percentage of baseball teams WinPct_i = 0.500 - 0.1 Team ERA_i + 0.2 Team BA_i + U_i, 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) 0.510 B) 0.600 C) A decrease of 0.1 in winning percentage D) There is not enough information

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Quizplus · Accepted Answer

An increase in team ERA would result in a decrease in winning percentage according to the proposed function (as seen by the negative coefficient of -0.1 in front of Team ERA). Therefore, an increase from 2.3 to 3.3 would result in a decrease of 0.1 in winning percentage.

Consider the Following Proposed Determining Function for the Winning Percentage