9 https://www.mathxl.com/Student/PlayerTest.aspx?testid 167080987&centerwin; yes

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9 https://www.mathxl.com/Student/PlayerTest.aspx?testid 167080987&centerwin; yes MTH 240-41H Quiz: Ch 7 Quiz Wallace 12/2/17 10:56 PM This Question: 1 pt Submit Quiz This Quiz: 42 pts possible There are two college entrance exams that are often taken by students, Exam A and Exam B. The composite score on Exam A is approximately normally distributed with mean 20.2 and standard deviation 4.7. The composite score on Exam B is approximately Suppose you scored 27 on Exam A and 1226 on Exam B. Which exam did you score better on? Justify your reasoning using the normal model. normally distributed with mean 1030 and standard deviation 203. A. The score on Exam A is better, because the percentile for the Exam A score is higher. O B. The score on Exam A is better, because the difference between the score and ° C. The score on Exam B is better, because the percentile for the Exam B score is higher the mean is lower than it is for Exam B O D. The score on Exam B is beter because the score s higher than the score for ExamA.

Explanation / Answer

Solution:- (A)

Test A :-

Mean = 20.2

Standard deviation = 4.7

Cumulative probability: P(X < 27) = 0.92602

Test B :-

Mean = 1030

Standard deviation = 203

Cumulative probability: P(X < 1226) = 0.83286

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