An engineer wants to determine how the weight of a gas
Last updated: 10/24/2023
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 Complete parts a through d below Click here to view the weight and gas mileage data a Find the least squares regression line treating weight as the explanatory variable and miles per gallon as the response variable 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 miles per gallon on average per gallon on average A weightless car will get mile s mile s OB For every pound added to the weight of the car gas mileage in the city will decrease by per gallon on average It is not appropriate to interpret the y intercept OC A weightless car will get miles per gallon on average It is not appropriate to interpret the slope OD It is not appropriate to interpret the slope or the y intercept The estimated average miles per gallon for cars of this weight is is Vaverage for cars of this weight Round to three decimal places as needed c A certain gas powered car weighs 3561 pounds and gets 17 miles per gallon Is the miles per gallon of this car above average or below average for cars of this weight miles per gallon The miles per gallon of this car 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 Yes because the hybrid is partially powered by gas OC No because the absolute value of the correlation coefficient is less than the critical value for a sample size of n 10 On No hecause the hybrid is a different type of car