Here are the sales (in billions of dollars) of Pfizer®€™s and AstraZeneca®€™s top-ten-selling drugs:

a. Construct a histogram for the Pfizer data and a histogram for the AstraZeneca data. For each histogram, begin with lower class limit 0.5 billion dollars and class width 0.5 billion dollars. Describe the distributions.
b. What should be used to measure the center of each data set, the mean or the median? Explain.
c. Find the median sales of Pfizer€™s top-ten-selling drugs. Also find the median sales of AstraZeneca€™s top-ten-selling drugs.
d. Which company has the larger median sales? What does that mean in this situation?
e. In January 2014, Pfizer tried to buy AstraZeneca. Explain why it makes sense that Pfizer might be in a better position than AstraZeneca to buy the other company.

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Pfizer AstraZeneca 2.9 1.2 4.0 0.6 3.5 1.0 1.9 2.3 1.1 1.3 5.6 0.8 3.8 1.4 1.2 1 3.9 0.7 4.6 0.9