Question

An incoming MBA student took placement exams in economics and mathematics. In​ economics, she scored 85 and in math 89. The overall results on the economics exam had a mean of 75 and a standard deviation of 8​, while the mean math score was 68​, with a standard deviation of 10. On which exam did she do better compared with the other​ students?Since she scored ___________ standard deviations ___________ the mean in economics and ___________ standard deviations _________ the mea in mathematics, she did better on the _________ exam.(Round to two decimal places as needed.)

Answer 1

Answer:

She did better on the math exam compared with the other students

Step-by-step explanation:

Hi!

We to calculate how many standard deviations from the mean she scored we need to use the following formulae:

(score - mean)/std

for economics:

(85 - 75)/8 = 10/8 = 1.25

for math:

(89 - 68)/10 = 21/20 = 2.1

Since she scored 1.25 standard deviations higher than the mean in economics and 2.1 standard deviations higher than the mean in mathematics, she did better on the MATH exam