Ezra's friend, gwen, takes the math portion of the act and scores 27. act math scores are normally distributed with a mean of 20.7 and a standard deviation of 5.0. what is the z-score for gwen's act score? 2.11 1.42 2.03 1.26 9. suppose ezra's z-score is 1.50 and gwen's z-score is 1.20; if we assume that both assessments measure the same kind of ability, who did better: ezra or gwen? ezra and gwen did equally as well as each other. ezra gwen we do not have enough information to determine who had the higher score.