A study is done to compare the fuel efficiency of cars. The first group of cars generally get about 30 miles per gallon. The second group of cars generally get about 15 miles per gallon. Based on the mean values of each​ group, what inference can be​ made? What else might a person conclude from the mean​ values? Which of the following is a correct inference based on the mean​ values? A. The cars in group 1 and group 2 are  equally fuel efficient.
B. The cars in group 1 generally are m ore fuel efficient.
C. The cars in group 2 generally are m ore fuel efficient.​