Suppose that marks on a test are normally distributed with standard deviation 12. If 83% of the class passed the test (i.e., got a mark of at least 50), find the mean μ. (A) 65.81 (B) 53.96 (C) 72.13 (D) 38.60 (E) 61.40
Suppose that marks on a test are normally distributed with standard deviation 12. If 83% of the class passed the test (i.e., got a mark of at least 50), find the mean μ. (A) 65.81 (B) 53.96 (C) 72.13 (D) 38.60 (E) 61.40
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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Why is the answer E Why is it 61.40
Transcribed Image Text:13. Suppose that marks on a test are normally distributed with standard deviation 12. If 83% of
the class passed the test (i.e., got a mark of at least 50), find the mean µ.
(A) 65.81 (B) 53.96 (C) 72.13 (D) 38.60 (E) 61.40
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