Suppose that the speed at which cars go on the freeway is normally distributed with mean 80 mph and standard deviation 7 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( 80 v 7 b. If one car is randomly chosen, find the probability that it is traveling more than 79 mph. 0.5568 c. If one of the cars is randomly chosen, find the probability that it is traveling between 82 and 87 mph. 0.2289 d. 71% of all cars travel at least how fast on the freeway? mph.

Suppose that the speed at which cars go on the freeway is normally distributed with mean 80 mph and standard deviation 7 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( 80 v 7 b. If one car is randomly chosen, find the probability that it is traveling more than 79 mph. 0.5568 c. If one of the cars is randomly chosen, find the probability that it is traveling between 82 and 87 mph. 0.2289 d. 71% of all cars travel at least how fast on the freeway? mph.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

I keep ending up with 76 and anything after it with a decimal point has been wrong so far. for example 76.1290 or anything in the 70s is wrong. I have also tried rounding and I still cannot come out with the answer.