An engineer wants to determine how the weight of a gas-powered car, x, affects gas mileage, y. The accompanying data represent the weights of various domestic cars and their miles per gallon in the city for the most recent model year Comple parts (a) through (d) below. CITIE (a) Find the least-squares regression line treating weight as the explanatory variable and miles per gallon as the response variable ŷ=x+ (Round the x coefficient to five decimal places as needed. Round the constant to one decimal place as needed.) (b) Interpret the slope and y-intercept, if appropriate. Choose the correct answer below and fill in any answer boxes in your choice. (Use the answer from part a to find this answer.) OA. For every pound added to the weight of the car, gas mileage in the city will decrease by OB. A weightless car will get miles per gallon, on average. It is not appropriate to interpret the slope. OC. For every pound added to the weight of the car, gas mileage in the city will decrease by OD. It is not appropriate to interpret the slope or the y-intercept mile(s) per gallon, on average. A weightless car will get miles per gallon, on average. OC. No, because a hybrid gas and electric car is a different type of car OD. Yes, because a hybrid gas and electric car is partially powered by gas. mile(s) per gallon, on average. It is not appropriate to interpret the y-intercept (c) A certain gas-powered car weighs 3578 pounds and gets 17 miles per gallon. Is the miles per gallon of this car above average or below average for cars average for cars of this weight. The estimated average miles per gallon for cars of this weight is miles per gallon. The miles per gallon of this car is (Round to three decimal places as needed) (d) Would it be reasonable to use the least-squares regression line to predict the miles per gallon of a hybrid gas and electric car? Why or why not? OA. Yes, because the absolute value of the correlation coefficient is greater than the critical value for a sample size of n = 10. OB. No, because the absolute value of the correlation coefficient is less than the critical value for a sample size of n = 10 this weight?
An engineer wants to determine how the weight of a gas-powered car, x, affects gas mileage, y. The accompanying data represent the weights of various domestic cars and their miles per gallon in the city for the most recent model year Comple parts (a) through (d) below. CITIE (a) Find the least-squares regression line treating weight as the explanatory variable and miles per gallon as the response variable ŷ=x+ (Round the x coefficient to five decimal places as needed. Round the constant to one decimal place as needed.) (b) Interpret the slope and y-intercept, if appropriate. Choose the correct answer below and fill in any answer boxes in your choice. (Use the answer from part a to find this answer.) OA. For every pound added to the weight of the car, gas mileage in the city will decrease by OB. A weightless car will get miles per gallon, on average. It is not appropriate to interpret the slope. OC. For every pound added to the weight of the car, gas mileage in the city will decrease by OD. It is not appropriate to interpret the slope or the y-intercept mile(s) per gallon, on average. A weightless car will get miles per gallon, on average. OC. No, because a hybrid gas and electric car is a different type of car OD. Yes, because a hybrid gas and electric car is partially powered by gas. mile(s) per gallon, on average. It is not appropriate to interpret the y-intercept (c) A certain gas-powered car weighs 3578 pounds and gets 17 miles per gallon. Is the miles per gallon of this car above average or below average for cars average for cars of this weight. The estimated average miles per gallon for cars of this weight is miles per gallon. The miles per gallon of this car is (Round to three decimal places as needed) (d) Would it be reasonable to use the least-squares regression line to predict the miles per gallon of a hybrid gas and electric car? Why or why not? OA. Yes, because the absolute value of the correlation coefficient is greater than the critical value for a sample size of n = 10. OB. No, because the absolute value of the correlation coefficient is less than the critical value for a sample size of n = 10 this weight?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.6: The Inverse Trigonometric Functions
Problem 94E
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