as7

Interpretation of the Results

Using a sample of 37 automobiles, a one-way ANOVA was conducted to compare fuel economy for

three categories of automobiles [i.e., four cylinder (n = 19), six cylinder (n = 10), and eight cylinder (n

= 8) automobiles]. There was a significant difference in fuel economy between the groups [F(2, 34) =

39.10, p < .001]. Post hoc comparisons using the Tukey HSD test indicated that there was a difference

in the fuel economy between the four-cylinder (M = 30.02, SD = 4.18) and six-cylinder (M = 21.01, SD

= 4.08) automobiles, p < .001, as well as between the four-cylinder and the eight-cylinder

automobiles (M = 17.45, SD = 1.20), p < .001. However, there was no significant difference in fuel

economy between the six and eight-cylinder automobiles, p = .113. Based on the results, we can

conclude that four-cylinder cars have better fuel economy than six and eight-cylinder cars (by 8.9

mpg and 12.6 mpg, respectively), but six and eight-cylinder cars do not meaningfully differ from one

another in terms of their miles per gallon consumed.