Three Groups of Wine Connoisseurs Rated the Flavor Profile of the Same

Three groups of wine connoisseurs rated the flavor profile of the same wine on a 10-point scale with 10 being the most favorable rating. Different comments were made to each group about the wine prior to the tasting in order to determine their possible influence on the ratings. The comments were as follows:
Group A: "Don't expect much."
Group B: "Not bad."
Group C: "Exceptional."
The ratings for each group are shown below. Use the Kruskal-Wallis H test to determine if there were significant differences in the ratings. Use α = .01, two-tailed.
Group A: 4, 3, 4, 5, 6, 2, 7
Group B: 6, 7, 6, 5, 8, 7, 5
Group C: 8, 10, 7, 9, 10, 8, 7

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Kruskal-Wallis H test:
For df = 2 and...

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