Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. a. What is the distribution of X? X ~ N( ___ , ___ ) b. If one car is randomly chosen, find the probability that it is traveling more than 71 mph. Round to 4 decimal places. [ ______ ] c. If one of the cars is randomly chosen, find the probability that it is traveling between 77 and 81 mph. Round to 4 decimal places. [ ______ ]
Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. a. What is the distribution of X? X ~ N( ___ , ___ ) b. If one car is randomly chosen, find the probability that it is traveling more than 71 mph. Round to 4 decimal places. [ ______ ] c. If one of the cars is randomly chosen, find the probability that it is traveling between 77 and 81 mph. Round to 4 decimal places. [ ______ ]
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car.
a. What is the distribution of X? X ~ N( ___ , ___ )
b. If one car is randomly chosen, find the probability that it is traveling more than 71 mph. Round to 4 decimal places. [ ______ ]
c. If one of the cars is randomly chosen, find the probability that it is traveling between 77 and 81 mph. Round to 4 decimal places. [ ______ ]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0fe4fd1f-2fa0-4404-8ffe-f852e50fa0fd%2F2ade0c2a-a8aa-4a82-978a-6830a2e7e8ce%2F1t5ie1f_processed.png&w=3840&q=75)
Transcribed Image Text:Suppose that the speed at which cars go on the freeway is normally distributed with mean 75 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car.
a. What is the distribution of X? X ~ N( ___ , ___ )
b. If one car is randomly chosen, find the probability that it is traveling more than 71 mph. Round to 4 decimal places. [ ______ ]
c. If one of the cars is randomly chosen, find the probability that it is traveling between 77 and 81 mph. Round to 4 decimal places. [ ______ ]
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