Suppose the average speeds of passenger trains travelling from Winnipeg to Churchill in Manitoba are normally distributed,
Question:
Suppose the average speeds of passenger trains travelling from Winnipeg to Churchill in Manitoba are normally distributed, with a mean average speed of 142 km/h and a standard deviation of 10.3 km/h.
a. What is the probability that a train will average less than 110 km/h?
b. What is the probability that a train will average more than 130 km/h?
c. What is the probability that a train will average between 145 km/h and 160 km/h?
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Step by Step Answer:
To solve these problems we can use the Zscore formula and standard normal distribution table The Zscore represents how many standard deviations an obs...View the full answer
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Related Book For 
Business Statistics For Contemporary Decision Making
ISBN: 9781119577621
3rd Canadian Edition
Authors: Ken Black, Ignacio Castillo
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