The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records, they have found that the length of a first interview is normally distributed, with mean ? = 39 minutes and standard deviation ? = 6 minutes. (Round your answers to four decimal places.)   (a) What is the probability that a first interview will last 40 minutes or longer?   (b) Eleven first interviews are usually scheduled per

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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The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records, they have found that the length of a first interview is normally distributed, with mean ? = 39 minutes and standard deviation ? = 6 minutes. (Round your answers to four decimal places.)
 
(a)
What is the probability that a first interview will last 40 minutes or longer?
 
(b)
Eleven first interviews are usually scheduled per day. What is the probability that the average length of time for the eleven interviews will be 40 minutes or longer?
 
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