An incoming MBA student took placement exams in economics and mathematics. In ec

Question

An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 80 and in math 88. The overall results on the economics exam had a mean of 72 and a standard deviation of 6, while the mean math score was 68, with a standard deviation of 13. On which exam did she do better compared with the other students? Since she score standard deviations (Round to two decimal places as needed.) the mean in economics and standard deviations the mean in mathematics, she did better on the exam

Explanation / Answer

z score for economics = (80 - 72)/6 = 8/6 = 1.33

z score for mathematics = (88 - 68)/13 = 20/13 = 1.54

Hence,

Since she scored 1.33 standard deviations above the mean in economics and 1.54 standard deviations above the mean in mathematics, she did better on the mathematics exam.

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