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Hypothesis Testing, ANOVA

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A real estate developer is considering investing in a shopping mall on the outskirts of Atlanta, Georgia. Three parcels of land are being evaluated. Of particular importance is the income in the area surrounding the proposed mall. A random sample of four families is selected near each proposed mall. Following are the sample results.
At the 0.05 significance level, can the developer conclude there is a difference in the mean income? Use the usual five-step hypothesis testing procedure.

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