Mathematics, 17.08.2019 20:20 milo3685
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 miles.
the level of confidence for this estimate is %.
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