Data on motor power (in horsepower) and fuel efficiency (in miles per gallon) was recorded from 31 classic vehicle models from the early 1970s. The scatterplot of the data appears below. 7. (3 points) Select the true statements about the regression line shown in the scatterplot. Indicate all true statements. ?The regression line will have a negative intercept. The regression line can be used to predict the fuel efficiency (mpg) of a classic vehicle model based on the vehicle's horsepower (hp). The regression line can be used to predict the horsepower (hp) of a classic vehicle model based on the vehicle's fuel efficiency (mpg). The $R^2$ value for this regression model will be negative.
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The following scatterplot displays data on Gross Horsepower (hp) vs. Miles per Gallon (mpg) of 32 automobiles extracted from Motor Trends US magazine in 1974. The regression line is y = 324.08 - 8.83*x with R^2 = 0.6024. Miles per Gallon
T. L.
Weight (100 lbs) For this data set, X represents the weight of each car in hundreds of pounds, and Y represents the predicted fuel efficiency of each car in miles per gallon (mpg). A reasonable value for the slope of the regression line is -1.11. Which of the following statements is the most complete valid conclusion about the relationship between weight and fuel efficiency? Heavier cars tend to have lower mpg ratings. For every 100-pound increase in car weight, we expect to see a 1.11 mpg increase in fuel efficiency. For every 1-pound increase in car weight, we expect to see a 1.11 mpg decrease in fuel efficiency. For every 100-pound increase in car weight, we expect to see a 1.11 mpg decrease in fuel efficiency.
Adi S.
c) Find the correlation between horsepower and miles per gallon. r = (Round to three decimal places as needed.) d) What does the plot say about fuel economy? A. Vehicles in the selected group with more horsepower have higher mileage. B. Vehicles in the selected group with more horsepower have lower mileage. C. There is little or no evidence of a correlation between horsepower and mileage in vehicles of the selected group.
Ahmet Y.
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