EXAMPLE 16.4 Reading Software output

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CASE 16.1 Figure 16.4 shows the output for our data from Minitab. Minitab offers only the Normal approximation, and it refers to the Mann-Whitney test.This is an alternative form of the Wilcoxon rank sum test. Minitab gives the approximate onesided -value as 0.0139 which agrees with our result in Example 16.3.

Mann-Whitney test

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Figure 16.4: FIGURE 16.4 Output from Minitab for the data in Case 16.1. Minitab uses the Normal approximation for the distribution of .