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2. (6 points) In a sample of 821 households in Morocco, the volume of water consumed in a week was 334 liters with a standard

2. (6 points) In a sample of 821 households in Morocco, the volume of water consumed in a week was 334 liters with a standard deviation of 591 liters. Test that the average volume of water consumed by Moroccan households in a week is different from 300 liters, using a 10% significance level.

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