An economics instructor observed that the marks in his Money and Banking course are normally distributed. He observed that the average was 73% with a standard deviation of 12% on the final exams 77% with a standard deviation of 10%. What is the probability that the mean mark of four randomly selected students from a day class is greater than the average mark of his day classes. His evening classes average four randomly selected students from an evening class?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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An economics instructor observed that the marks in his Money and Banking course
are normally distributed. He observed that the average was 73% with a standard
deviation of 12% on the final exams in his day classes. His evening classes average
77% with a standard deviation of 10%. What is the probability that the mean mark of
four randomly selected students from a day class is greater than the average mark of
four randomly selected students from an evening class?
a) 0.5050
O b) 0.3050
c) 0.4050
d) 0.6950
e) None of the answers are correct
Transcribed Image Text:An economics instructor observed that the marks in his Money and Banking course are normally distributed. He observed that the average was 73% with a standard deviation of 12% on the final exams in his day classes. His evening classes average 77% with a standard deviation of 10%. What is the probability that the mean mark of four randomly selected students from a day class is greater than the average mark of four randomly selected students from an evening class? a) 0.5050 O b) 0.3050 c) 0.4050 d) 0.6950 e) None of the answers are correct
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