Xr14-05 A consumer organization was concerned about the differences between the advertised sizes of containers and the actual amount of product. In a preliminary study, six packages of three different brands of margarine that are supposed to contain 500 ml were measured. The differences from 500 ml are listed here. Do these data provide sufficient evidence to conclude that differences exist between the three brands? Use   .01.

Brand 1 Brand 2 Brand 3 1 2 1 3 2 2 3 4 4 0 3 2 1 0 3 0 4 4