Use the Kruskal-Wallis H test and the MINITAB output in Figure 18.5 to compare the bottom (B), middle (M), and top (T) display heights using the data in Table 18.10. Use α = .05. Then, repeat the analysis if the first sales value for the middle display height is found to be incorrect and must be removed from the data set.
TABLE 18.10
Bakery Sales Study Data (Sales in Cases)

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Shelf Display Height Bottom (B) 58.2 53.7 55.8 55.7 52.5 58.9 Middle (M) 73.0 78.1 75.4 76.2 78.4 82.1 Top (T) 52.4 49.7 50.9 54.0 52.1 49.9