A mobile phone store retailer conducts a study to determine whether the number of contracts sold per day by stores is affected by the number of competitors within a 1km radius and the location of the store. The company researchers selected three types of stores for consideration in the study: standalone suburban stores, shopping centre stores and downtown stores. These stores vary in the numbers of competing stores within a 1 kmradius, which have been reduced to four categories: 0, 1, 2 and 3 or more competitors. Suppose the following data represent the number of contracts sold per day in each of these types of stores with the given number of competitors. Use ? = 0.05 and a two-way ANOVA to analyse the data.

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Number of competitors 2 Store location 3 or more Standalone 39 42 38 65 45 43 41 20 50 87 54 52 Shopping centre 30 35 24 31 45 52 56 50 43 65 38 31 Downtown 21 16 28 34 25 27 27 32 34 34 32