Soho Paint set up a market test in two separate regions of the country to examine the effects of a new wholesale pricing policy. A sample of 100 industrial customers was randomly selected from the Northeast region. Twentyeight of the customers in the sample reacted negatively to the new policy. In a similar sample of 120 industrial customers on the West Coast 18 reacted negatively. Build and interpret an appropriate 95% confidence interval estimate of the difference in negative reaction rates for the two customer populations represented here.
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