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 $9\mathrm{.}72$ miles with a margin or error of $0\mathrm{.}22$ 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 $9.$