Question

In: Math

City Mileage, Highway Mileage. We expect a car's highway gas mileage to be related to its...

City Mileage, Highway Mileage. We expect a car's highway gas mileage to be related to its city gas mileage (in miles per gallon, mpg). Data for all 1137 vehicles in the government's 2013 Fuel Economy Guide give the regression line

highway mpg = 6.785 + (1.033 x city mpg)

for predicting highway mileage from city mileage.

(a) What is the slope of this line? Say in words what the numerical value of the slope tells you.

(b) What is the intercept? Explain why the value of the intercept is not statistically meaningful.

(c) Find the predicted highway mileage for a car that gets 16 miles per gallon in the city. Do the same for a car with city mileage of 28 mpg.

Solutions

Expert Solution

milcah answered 1 year ago
Next > < Previous

Related Solutions

The excel file gives the city and highway gas mileage for 21 two-seater cars, including the...
The excel file gives the city and highway gas mileage for 21 two-seater cars, including the Leaf hybrid car: Type City Hwy T 17 24 T 20 28 T 20 28 T 17 25 T 18 25 T 12 20 T 11 16 T 10 16 T 17 23 T 60 66 T 9 15 T 9 13 T 15 22 T 12 17 T 22 28 T 16 23 T 13 19 T 20 26 T 20 29 T...
Write a beginner's program in Python to determine your car's gas mileage. You should use the...
Write a beginner's program in Python to determine your car's gas mileage. You should use the input variables "miles_traveled" and "gallons_fuel" and the result should be stored in the variable "miles_per_gallon".
4. In a recent publication, it was reported that the average highway gas mileage of tested...
4. In a recent publication, it was reported that the average highway gas mileage of tested models of a new car was 33.2 mpg with a standard deviation of 2.5 mpg, with the mileages approximately normally distributed. H0 : µ = 33.2 Ha : µ < 33.2 Part a: Describe a Type II error in the context of the hypothesis test. Part b: If a simple random sample of 100 cars is selected, what values of the sample mean ¯x...
4. In a recent publication, it was reported that the average highway gas mileage of tested...
4. In a recent publication, it was reported that the average highway gas mileage of tested models of a new car was 33.2 mpg with a standard deviation of 2.5 mpg, with the mileages approximately normally distributed. H0 : µ = 33.2 Ha : µ < 33.2 Part a: Describe a Type II error in the context of the hypothesis test. Part b: If a simple random sample of 100 cars is selected, what values of the sample mean ¯x...
In a recent publication, it was reported that the average highway gas mileage of tested models...
In a recent publication, it was reported that the average highway gas mileage of tested models of a new car was 33.5 mpg. A consumer group conducts its own tests on a simple random sample of 12 cars of this model and finds that the mean gas mileage for their vehicles is 31.6 mpg with a standard deviation of 3.4 mpg. a) Choose an appropriate significance test for the consumer group to perform to test the publication's assertion. b) The...
In a recent publication, it was reported that the average highway gas mileage of tested models...
In a recent publication, it was reported that the average highway gas mileage of tested models of a new car was 33.2 mpg with a standard deviation of 2.5 mpg, with the mileages approximately normally distributed. H0 :μ=33.2 Ha :μ<33.2 Part a: Describe a Type II error in the context of the hypothesis test. Part b: If a simple random sample of 100 cars is selected, what values of the sample mean x ̄ would represent sufficient evidence to reject...
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 22.0 mi/gal...
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 22.0 mi/gal , how many liters of gasoline would you need to buy to complete a 142-km trip in Europe? Use the following conversions: 1km=0.6214mi and 1gal=3.78L. While in Europe, if you drive 107 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 28.0 mi/gal ? Assume that...
Use the data below, showing a summary of highway gas mileage for several observations, to decide...
Use the data below, showing a summary of highway gas mileage for several observations, to decide if the average highway gas mileage is the same for midsize cars, SUV’s, and pickup trucks. Test the appropriate hypotheses at the α = 0.01 level. n Mean Std. Dev. Midsize 31 25.8 2.56 SUV’s 31 22.68 3.67 Pickups 14 21.29 2.76
The data below was collected from manufacturer advertisements of their vehicles horsepower and highway gas mileage...
The data below was collected from manufacturer advertisements of their vehicles horsepower and highway gas mileage (mpg.). Use this data to answer the following questions. x 158 250 340 350 390 190 220 y 33 28 15 17 11 35 42 1. Find the the correlation coefficient. Round your final answer to four decimal places. r=r=   2. Write the regression equation below. Round all numbers to four decimal places. ˆy=y^= 3. Using the data shown above,predict the the highway gas...
1. The data below is the city gas mileage for a sample of hybrid cars, as...
1. The data below is the city gas mileage for a sample of hybrid cars, as reported by the Environmental Protection Agency in 2007. 30, 36, 33, 27, 31, 25, 28, 31, 45 mpg Construct and interpret a 95% confidence interval for the population mean for the miles per gallon of hybrids. You may assume that the population of gas mileage normally distributed with no outliers. Answer the following:                         a What is...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT