SOLUTION: 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 own
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Question 433174: 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. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! 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.
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p-hat = 40/50 = 0.9
ME = 1.96*sqrt[0.9*0.1/50] = 0.083156
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90% CI: 0.9-0.0832 < P < 0.9+0.0832
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Cheers,
Stan H.
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