Table 5.13 (page 237 in the textbook) shows the observed pollution indexes of air samples in two areas of a city. Using a Statistical software, test the hypothesis that the mean pollution indexes are the same for the two areas using? = 0.05. Check the normality of data sets using a graphical method (hint: side-by-side boxplot). Be sure to include the edited computer output and to interpret the results. Area A 2.92 1.88 5.35 3.87 4.69 2.86 5.81 3.55 Area B 1.84 1.95 4.26 3.18 3.44 3.69 4.95 4.47

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