Transcribed Image Text:Suppose that the speed at which cars go on the freeway is normally
distributed with mean 71 mph and standard deviation 10 miles per hour.
Let X be the speed for a randomly selected car. Round all answers to 4
decimal places where possible.
a. What is the distribution of X? X – N 71
10
b. If one car is randomly chosen, find the probability that it is traveling
more than 70 mph.
c. If one of the cars is randomly chosen, find the probability that it is
traveling between 73 and 76 mph.
d. 69% of all cars travel at least how fast on the freeway?
mph.
distributed with mean 71 mph and standard deviation 10 miles per hour.
Let X be the speed for a randomly selected car. Round all answers to 4
decimal places where possible.
a. What is the distribution of X? X – N 71
10
b. If one car is randomly chosen, find the probability that it is traveling
more than 70 mph.
c. If one of the cars is randomly chosen, find the probability that it is
traveling between 73 and 76 mph.
d. 69% of all cars travel at least how fast on the freeway?
mph.
