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 .05 significance level, can the developer conclude there is a difference in the mean income? Use the usual six-step hypothesis testingprocedure.

Southwyck Area (S000) 64 68 70 60 Franklin Park ($000) 74 71 69 70 Old Orchard ($000) 75 80 76 78