Let us revisit Example 8.5, where Jared Beane wants to construct a 90% confidence interval of the mean mpg of all ultra-green cars. Suppose Jared would like to constrain the margin of error to within 2 mpg. Further, Jared knows that the lowest mpg in the population is 76 mpg, whereas the highest is 118 mpg. How large a sample does Jared need to compute the 90% confidence interval of the population mean? P-69