Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia, Pennsylvania, are normally
Question:
Suppose the average speeds of passenger trains traveling from Newark, New Jersey, to Philadelphia, Pennsylvania, are normally distributed, with a mean average speed of 88 miles per hour and a standard deviation of 6.4 miles per hour.
a. What is the probability that a train will average less than 70 miles per hour?
b. What is the probability that a train will average more than 80 miles per hour?
c. Compute the probability that a train will average between 90 and 100 miles per hour?
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m 88 64 a Px 70 From Table A5 area 4975 Px 70 5000 4975 00...View the full answer
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Related Book For 
Business Statistics for Contemporary Decision Making
ISBN: 978-0470910184
6th Edition
Authors: Ken Black
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