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Problem 3


7.5 Small-Sample Confidence Intervals for a Population Mean

I have kept track of my car’s fuel consumption over the past month.  I observed the mpgs for 17 trips from my home to FIU.  The average mpgs for the 17 trips was 31.1 mpg with a standard deviation of 2.1 mpg.  Form a 95% confidence interval for my true fuel consumption when driving to FIU.  To keep my gas budget in check, I need to average at least 30 miles per gallon.  Based on the interval you just created, should I slow down?


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