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Solution: [1%] CONFIDENCE INTERVALS: A sample of 50 Hummer owners revealed that 40 have cut back on their driving due to the increased cost of gasoline.

Question: [1%] CONFIDENCE INTERVALS: A sample of 50 Hummer owners revealed that 40 have cut back on their driving due to the increased cost of gasoline. Give a 90% confidence interval for the proportion of Hummer owners who plan to cut back their driving. [Please use the following format (0.###, 0.###)]

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Solution: [1%] CONFIDENCE INTERVALS: A sample of 50 Hummer owners revealed that 40 have cut back on their driving due to the increased cost of gasoline.

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