Question: New car models with names such as the Volt and the Leaf are being hyped by automakers, as they scramble to produce electric cars that

New car models with names such as the "Volt" and the "Leaf" are being hyped by automakers, as they scramble to produce electric cars that are affordable for most Americans. Still in the trial stage, BMW's Mini E can be leased for about $600 per month, and is claimed to be able to travel between 100 and 120 miles per battery charge. Suppose that n = 60 field trials are conducted and that the average time between charges is 112.5 miles with a standard deviation of 4.6 miles.
a. Construct a 95% confidence interval for m, the average time between battery charges for BMW's Mini E.
b. Does the confidence interval in part a confirm the claim of 100 to 120 miles per battery charge? Why or why not?

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