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25 random samples of 30 people each were measured for their daily water usage. The mean for each sample is included in the dot

25 random samples of 30 people each were measured for their daily water usage. The mean for each sample is included in the dot plot. 100 110 120 130 140 150 160 daily water use (gallons) Use the values to estimate the mean water usage for the population. What is the margin of error for this estimate based on these values? (Round to the nearest tenth of a gallon.)

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