The Energy Information Administration records per capita consumption of energy by country. The 2006 data for the 27 nations that now make up the European Union are used to create the boxplot below. The energy values (in millions of BTUs) have a mean of 167.8 and a standard deviation of 72.8, and are roughly bell shaped, except for the value of 424.1 for Luxembourg.
a. Using the MINITAB box plot shown, give approximate values for the five-number summary and indicate whether any countries were judged to be potential outliers according to that plot.
b. Italy had a value of 138.7. How many standard deviations from the mean was it?
c. The United States is not in the data used below, but its value was 334. Relative to the distribution for the EU nations, how many standard deviations from the mean was it?

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Boxplot of Consumption 本 00 150 200 250 300 350 400 450 Consumption