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A sample of 14 recent transactions on Amazon.com shows an average customer rating of 354. Based on the historical data, the population standard deviation of

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A sample of 14 recent transactions on Amazon.com shows an average customer rating of 354. Based on the historical data, the population standard deviation of customer ratings is known to be 0.25. We have 95% condence to say that the average customer rating during the period when the sample is collected is at least ______ . (Enter 4 digits after the decimal point e.g. 3.1234)

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