Question: In 2 0 1 1 the U . S . Department of Transportation reported with 9 5 % confidence that the average length of a

In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length of a motor vehicle trip in the United States was 9.72 miles with a margin or error of 0.22 miles.
With 95% confidence the authors of the report are claiming that the true average length of a motor vehicle trip in the United States is between and miles.
The level of confidence for this estimate is 9.
In 2011 the U.S. Department of Transportation reported with 95% confidence

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