In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equal-size towels were used, with four sections of towels tested per brand. The absorbency rating data follow. At a 0.03level of significance, does there appear to be a difference in the ability of the brands to absorb water?

x	y	z
89	95	90
90	100	77
101	97	89
92	100	84