Using the data in Exercise 2:

a. Find the first and third quartiles of the profit.

b. Find the median profit.

c. Find the upper and lower outlier boundaries.

d. Are there any outliers? If so, list them.

e. Construct a boxplot for these data.

 Exercise 2

The following table presents the profit, in a recent year, in billions of dollars, for each of the 15 largest U.S. corporations in terms of revenue.

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Corporation Profit Corporation Profit Exxon Mobil 41.1 Ford Motor 20.2 Walmart 15.7 Hewlett-Packard 7.1 Chevron 26.9 AT&T 3.9 ConocoPhillips 12.4 Valero Energy 2.1 General Motors 9.2 Bank of America Corp. 1.5 General Electric 14.2 McKesson 1.2 Berkshire Hathaway 10.2 Verizon Communications 2.4 Fannie Mae -16.9