Business firms occasionally buy back their own stock for various reasons, sometimes when they view the market price as a bargain compared to their view of its true worth. It has been observed that the market price of stock often increases around the time of the announcement of such a buyback. Consider the data on actual percent changes over three months in stock prices for firms announcing stock buybacks shown in Table 3.9.2.
in Table 3.9.2.

a. Construct a histogram of this data set.
b. Construct a stem-and-leaf style histogram of this data set using pen and paper. Your horizontal axis might include four columns of numbers (€“0, 0, 1, and 2) representing the tens place.16
c. Based on these histograms, what can you say to summarize typical behavior of these stock prices following a buyback announcement?

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TABLE 3.9.2 Market Response to Stock Buyback Announcements Three- Month Price Three- Month Price Change -75% Company Change Company Tektronix 17.0% MTCorp General 2Ohio Casualy13.9 Motors Firestone 26.2 Kimberly-Clark 4.0 GAF Corp 4.3 Anheuser-Busch 192 Rockwell Hewlet-Packard 102 Int.