The miles per gallon ratings for 2001 model year vehicles vary according to an approximately Normal...

The miles per gallon ratings for 2001 model year vehicles vary according to an approximately Normal distribution with mean μ = 22.35 miles per gallon and standard deviation σ = 5.29 miles per gallon.

(a) What percent of vehicles have miles per gallon ratings greater than 28?
________%

(b) What percent of vehicles have miles per gallon ratings between 28 and 31?
________%

(c) What percent of vehicles have miles per gallon ratings less than 12.74?
_________%

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Below is a list of gas mileage ratings for selected passenger cars in miles per gallon....

Below is a list of gas mileage ratings for selected passenger cars in miles per gallon. 16.2 20.3 31.5 30.5 21.5 31.9 37.3 27.5 27.2 34.1 35.1 29.5 31.8 22.0 17.0 21.6 Find the mean, standard deviation, five - number summary, IQR, and identify any outliers. Use the five - number summary to sketch a boxplot. What does the boxplot tell you about the distribution of the data? (20 points)

At-term newborns in Canada vary in weight according to, approximately, a Normal distribution, with a mean...

At-term newborns in Canada vary in weight according to, approximately, a Normal distribution, with a mean of 3500 grams and standard deviation of 500 grams (a) Heavy birth weight (HBW) babies are those weighing over 4500 grams. Approxi- mately how many at-term newborns among the next 10000 will be HBW babies? (b) Low birth weight (LBW) babies are those weighing less than 2500 grams. Ap- proximately how many at-term newborns among the next 10000 will be LBW babies? (c) Approximately...

Miles per Gallon. The following stem-leaf plot is representing the number of miles per gallon achieved...

Miles per Gallon. The following stem-leaf plot is representing the number of miles per gallon achieved on the highway for 2013 small car models. Construct an Ogive of data by first construction a cumulative frequency table with class width of five. Include: Limits, frequency, and cumulative frequency. 2 2 means 22 miles per gallon 2 2 2 5 7 9 9 9 9 9 3 0 0 0 0 0 1 1 1 2 2 2 2 2 3 3...

The fuel consumption, in miles per gallon, of all cars of a particular model has a...

The fuel consumption, in miles per gallon, of all cars of a particular model has a mean of 25 and a standard deviation of 2. The population distribution can be assumed as normal. A random sample of these cars is taken. a. Find the probability that the sample mean fuel consumption will be fewer than 24 miles per gallon if (i) a sample of 1 observation is taken, (ii) a sample of 4 observations if taken and (iii) a sample...

The average gas mileage of a certain model car is 28.0 miles per gallon. If the...

The average gas mileage of a certain model car is 28.0 miles per gallon. If the gas mileages are normally distributed with a standard deviation of 0.4 miles per gallon, find the probability that a car has a gas mileage of between 26.8 and 27.2 miles per gallon. In addition to the answer, please write out your steps and thoughts that led you to your answer.

An automobile manufacturer claims that the new model gets an average of 30 miles per gallon...

An automobile manufacturer claims that the new model gets an average of 30 miles per gallon on the highway, with a standard deviation of 5 miles. However, when a consumer group drove 100 cars on the highways. the group found the average mileage was 28.5 miles. what can the consumer group assert with 99% confidence? check your answer with the p-value test?

Currently, a manager is using a regression model that predicts gas mileage (in miles per gallon)...

Currently, a manager is using a regression model that predicts gas mileage (in miles per gallon) based on the horsepower of a car and the car's weight (in pounds). She believes that the effect of HP on gas milage is affected by the weight and vice versa. Develop a regression model that includes horsepower, weight, and this new interaction effect to predict gas mileage. Complete parts (a) and (b). MPG- 15.3,19.5,20.8,18.9,17.2,27.5,44.4,27.2,28.3,21.1 Horsepower-187,101,143,171,166,72,70,89,87,134 Weight-4757,3537,3227,4448,4296,3191,2106,2490,2605,3871 a. At the 0.01level of significance, is...

According to Energy Information the average gas mileage of all automobiles is 21.4 miles per gallon....

According to Energy Information the average gas mileage of all automobiles is 21.4 miles per gallon. For a random sample of 40 sport utility vehicles, the mean gas mileage is 19.8 miles per gallon with a standard deviation of 3.5 miles per gallon. Test the claim that the mean mileage of all SUVs is different than the gas mileage of all automobiles. a) z = 2.89 and a p value of .9938 .9938 < 0.05 There is not sufficient evidence...

The mpg (miles per gallon) for all cars has a normal distribution with mean 100 km/L...

The mpg (miles per gallon) for all cars has a normal distribution with mean 100 km/L and standard deviation of 15 km/L a) Calculate the probability that any randomly selected car has an amount of mpg greater than 120 km/L. b) Calculate the probability that any randomly selected car has an amount of mpg less than 95 km/L. c) Calculate the probability that any randomly selected car has an amount of mpg between 93 km/L and 110 km/L. d) A...

you currently drive 300 miles per week in a car that gets 20 miles per gallon...

you currently drive 300 miles per week in a car that gets 20 miles per gallon of gas. you are considering buying a new fuel-efficient car for $12,000 ( after trade-in on your current car) that gets 50 miles per gallon. Insurance premiums for the new and old car are $900 and $500 per year, respectively. you anticipate spending $1300 per year on repairs for the old car and having no repairs on the new car. assume gas costs $3.50...

Subjects