(a) What is the probability that at most 39 greater than 67

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with = 45 and = 5.5.
USE SALT
(a) What is the probability that yield strength is at most 39? Greater than 67? (Round your answers to four decimal places.)
at most 39.
greater than 67
(b) What yield strength value separates the strongest 75% from the others? (Round your answer to three decimal places.)
ksi
Transcribed Image Text:An article suggested that yield strength (ksi) for A36 grade steel is normally distributed with = 45 and = 5.5. USE SALT (a) What is the probability that yield strength is at most 39? Greater than 67? (Round your answers to four decimal places.) at most 39. greater than 67 (b) What yield strength value separates the strongest 75% from the others? (Round your answer to three decimal places.) ksi
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