An incoming mba student took placement exams in economics and mathematics. in economics, she scored 8080 and in math 9090. the overall results on the economics exam had a mean of 7373 and a standard deviation of 66, while the mean math score was 6767, with a standard deviation of 1313. on which exam did she do better compared with the other students? since she scored nothing standard deviations ▼ above below the mean in economics and nothing standard deviations ▼ below above the mean in mathematics, she did better on the ▼ economics mathematics exam.