Speeding: On a stretch of Interstate-89, car
speed is a normally distributed variable with a mean of 68.9 mph
and a standard deviation of 3.5 mph.
You are traveling at 75 mph. Approximately what percentage of cars
are traveling faster than you? Enter your answer as a
percentage with 1 decimal place.
%
Speeding: On a stretch of Interstate-89, car speed is a normally distributed variable with a mean...
Speeding: On a stretch of Interstate-89, car speed is a normally distributed variable with a mean of 68.9 mph and a standard deviation of 4.1 mph. You are traveling at 75 mph. Approximately what percentage of cars are traveling faster than you? Enter your answer as a percentage with 1 decimal place. %
On a stretch of Interstate-89, car speed is a normally distributed variable with a mean of 68.1 mph and a standard deviation of 3.5 mph. You are traveling at 72 mph. Approximately what percentage of cars are traveling faster than you? Enter your answer as a percentage with 1 decimal place. ____ %
On a stretch of Interstate-89, car speed is a normally distributed variable with a mean of 69.3 mph and a standard deviation of 3.7 mph. Suppose you are a police officer on this stretch of road and only have time to ticket 2% of the cars that go by you. How fast should someone be traveling before you pull them over? Round your answer to 1 decimal place. mph
Suppose the speeds of cars along a stretch of I-40 is normally distributed with a mean of 70 mph and standard deviation of 8 mph. What would be the speed for a car whose z-score is z=−1.6? f a car is chosen at random on this stretch of highway, what is the probability it will be travelling at a speed below 70 mph? If a car is chosen at random on this stretch of highway, what is the probability it...
Suppose that the speed at which cars go on the freeway is normally distributed with mean 70 mph and standard deviation 8 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible. 1. If one of the cars is randomly chosen, find the probability that it is traveling between 69 and 73 mph.
Suppose that the speed at which cars go on the freeway is normally distributed with mean 73 mph and standard deviation 8 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 b. If one car is randomly chosen, find the probability that it is traveling more than 72 mph. c. If one of the cars is randomly chosen, find...
Suppose that the speed at which cars go on the freeway is normally distributed with mean 68 mph and standard deviation 6 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(_____,______) b. If one car is randomly chosen, find the probability that it is traveling more than 69 mph. ________ c. If one of the cars is...
Speeds of automobiles on a certain stretch of freeway at 11:00 pm are normally distributed with mean 65 mph. Twenty percent of the cars are travelling at speeds between 55 and 65 mph. What percent of the cars are going faster than 75 mph?
Assume that the speed of automobiles on an expressway during rush hour is normally distributed with a mean of 63 mph and a standard deviation of 5 mph. If 200 cars are selected at random, how many will be traveling slower than 55 mph? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. O Of the 200 cars, approximately cars will be traveling slower than...
(1 point) A)Suppose the scores of students on an exam are Normally distributed with a mean of 303 and a standard deviation of 89. Then approximately 99.7% of the exam scores lie between the numbers _____and_____ such that the mean is halfway between these two integers. (You are not to use R for this question.) B) A telemarketer calls people and tries to sell them a subscription to a daily newspaper. On 16% of her calls, there is no answer...