An automobile manufacturer needs to estimate the average highway fuel economy (miles per gallon) for a new truck that will be sold starting next year. A random sample of 101 trucks were tested for highway fuel economy and the sample had a mean of 33.5 miles per gallon with a standard deviation of 2.2 miles per gallon. Using a 95% confidence level, determine the margin of error, E, and a confidence interval for the average highway fuel economy of this new truck. Report the confidence interval using interval notation. Round solutions to two decimal places, if necessary. The margin of error is given by E = A 95% confidence interval is given by Question Help: Video

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