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The table to the right shows the results of a survey in which 400

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Question

RegionPercentageEast35%South32%Midwest25%West56% rowspan=”5″>The table to the right shows the results of a survey in which 400
adults from the East, 400 adults from the South, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Construct a 99% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.

 
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