Annual sales, in millions of dollars, for 21 pharmaceutical companies follow.

8408 1374 1872 8879 2459 11413 608 14138 6452 1850 2818 1356 10498 7478 4019 4341 739 2127 3653 5794 8305

a. Provide a five-number summary.

b. Compute the lower and upper limits.

c. Do the data contain any outliers?

d. Johnson & Johnson’s sales are the largest on the list at $14,138 million. Suppose a data entry error (a transposition) had been made and the sales had been entered as $41,138 million. Would the method of detecting outliers in part

(c) identify this problem and allow for correction of the data entry error?

e. Show a box plot.