The sales (in billions of dollars) of Pfizer€™s and AstraZeneca€™s top-ten-selling drugs are shown in Exercise 39.
In Exercise 39

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 spread of each data set, the range or the standard deviation? Explain.
c. Find the range of the sales of Pfizer€™s top-ten-selling drugs. Also find the range of the sales of AstraZeneca€™s top-ten- selling drugs.
d. Which company has the larger range of sales? What does that mean in this situation?
e. By referring to your result in part (d), explain why it makes sense that even though Pfizer has the larger median sales, AstraZeneca has the best-selling drug of the two companies. What are the sales of that drug?

Transcribed Image Text:

Pfizer AstraZeneca 2.9 1.2 4.0 0.6 3.5 1.0 1.9 2.3 1. 1.3 5.6 0.8 3.8 1.4 1.21.1 3.9 0.7 4.6 0.9