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A survey of 80 homes in a Washington, D. C. suburb showed that 45 were air-conditioned....

A survey of 80 homes in a Washington, D. C. suburb showed that 45 were air-conditioned. A sample of 120 homes in a Pittsburgh suburb showed that 63 had air conditioning. At ααα= .05, is there a difference in the two proportions? Let 1 = Washington and 2 = Pittsburgh

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