Question: To investigate the real cost of owning different makes and models of new automobiles, a consumer protection agency followed 16 owners of new vehicles of four popular makes and models, call them TC, HA, NA , and FT, and kept a record of each of the owner's real cost in dollars for the first five years. The five-year costs of the 16 car owners are given below:

Test, using the ANOVA F-test at the 5% level of significance, whether the data provide sufficient evidence to conclude that there are differences among the mean real costs of ownership for these four models.