Whistling dolphins. Marine scientists who study dolphin communication have discovered that bottlenose dolphins exhibit an individualized whistle contour known as their signature whistle. A study was conducted to categorize the signature whistles of 10 captive adult bottlenose dolphins in socially interactive contexts (Ethology, July 1995). A total of 185 whistles were recorded during the study period; each whistle contour was analyzed and assigned to a category by a contour similarity (CS) technique. The results are reported in the table on p. 138. Use a graphical method to summarize the results. Do you detect any patterns in the data that might be helpful to marine scientists?

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Data for Exercise 2.201 Whistle Category Type a Number of Whistles 97 15 9 Type b Type d Type e Type f Type g Type h Type i Type j Type k Other types 4 13 22277222222 25