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Find the mean amount of the highest cost item purchased

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Reference no: EM131642270

Question: Find a 95% confidence interval for the difference between the mean amount of the highest cost item purchased for the High customer category and the similar mean for the Medium customer category. Do the same for the difference between the Medium and Low customer categories. Because of the way these customer categories are defined, you would probably expect these mean differences to be positive. Is this what the data indicate?

Reference no: EM131642270

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