ADMS 2320 Final: Worded problems 1 exam.docx

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For questions 159 through 164, use the following narrative: An economist wanted to analyze the relationship between the speed of a car (x) and its gas mileage (y). As an experiment a car is operated at several different speeds and for each speed the gas mileage is measured. {car speed and gas mileage narrative} determine the least squares regression line. {car speed and gas mileage narrative} estimate the gas mileage of a car traveling 70 mph. {car speed and gas mileage narrative} calculate the standard error of estimate, and describe what this statistic tells you about the regression line. {car speed and gas mileage narrative} do these data provide sufficient evidence at the. {car speed and gas mileage narrative} predict with 99% confidence the gas mileage of a car traveling 55 mph. {car speed and gas mileage narrative} calculate the pearson coefficient of correlation.