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Confidence interval for the decrease in the percentage

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Reference no: EM132790749

Marketing companies widely use surveys in order to monitor the opinions of the consumers. Last year, a survey was undertaken to ask consumers who buy different warranties for electronic appliances. Of a sample of 1,100, 56% indicated that they would buy the warranty. This year, another survey of 800 consumers revealed that 46% will buy the warranty.

How to Calculate the appropriate one-sided 95% confidence interval for the decrease in the percentage of people who buy warranties for electronic appliances between last year and this year?

Reference no: EM132790749

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