Construct a confidence interval for the mean


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Q: Sixteen owners of 2005 Chrysler Pacifica 2WD vehicles kept track of their average fuel economy for a month. The results are shown below

Construct a 95 percent confidence Interval for the mean.

What factors(s) limit the conclusions that can be drawn about the true mean?

Data defining average fuel economy:
20.8; 20.0; 19.4; 19.7; 21.1; 22.6; 18.3; 20.1; 20.5; 19.5; 17.4; 22.4; 18.9; 20.2; 19.6; 19.0

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Basic Statistics: Construct a confidence interval for the mean
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