Question

The following data sets represent the highway fuel efficiency in miles per gallon (mpg) of randomly selected cars from two car companies. Which company has cars that are more consistent in highway fuel efficiency?
Car Company A: 35, 28, 35, 30, 31, 36, 35, 30
Car Company B: 29, 33, 40, 27, 34, 34, 34, 25
A. Cars from both companies have equally consistent highway fuel efficiency.
B. Car Company A is more consistent, because the range of highway fuel efficiency of its cars is lower than that of Car Company B.
C. Car Company B is more consistent, because the range of highway fuel efficiency of its cars is lower than that of Car Company A.
D. Car Company A is more consistent, because the range of highway fuel efficiency of its cars is higher than that of Car Company B.

Answer 1

B. Company A is more consistent.

Work: RangeA = 36 − 28 = 8 mpg; RangeB = 40 − 25 = 15 mpg. Since Company A has the smaller range, its highway fuel efficiencies are more consistent.