Weight miles per
(pounds), x gallon
3799 18
3877 15
2710 24
3582 18
3337 20
2984 23
3742 16
2566 24
3373 20
3696 16
3392 19
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 (c) below.
a) find the least-squares regression line treating weight as the explanatory variable and miles per gallon as the response variable.
b) a certain? the gas-powered car weighs 3600 pounds and gets 20 miles per gallon. are the miles per gallon of this car above average or below average for cars of this? weight?
c) 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? a. yes, because the hybrid is partially powered by gas b. no, because the hybrid is a different type of car c. no, because the absolute value of the correlation coefficient is less than the critical value for a sample size of n=11 d. he least-squares regression line to predict the miles per gallon of a hybrid gas and electric car? why or why? not? a. yes, because the hybrid is partially powered by gas b. no, because the hybrid is a different type of car c. no, because the absolute value of the correlation coefficient is less than the critical value for a sample size of n=11 d. yes, because the absolute value of the correlation coefficient is greater than the critical value for a sample size of n=11