A nationwide real estate brokerage house wants to study the relationship between rent per square foot and size of the property. The data collected are summarized in the accompanying table. Using these data, can we reject the null hypothesis that the average rents per square foot are equal? Do a 5 % test.

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Size of the property (in square feet) Less than 1,000 3 555455 5 1,000 to 2,000 2 5 5 56 6 5 6 2,000 or more 3 6 7 7 7 6