70 63 60 30 20 20 15 10 8 None Both Legs Only Wheels Only Type of Robotic Limbs Number of Robots
According to the United Nations, social robots now outnumber industrial robots worldwide. A social (or service) robot is designed to entertain, educate, and care for human users. In a paper published by the International Conference on Social Robotics (Vol. 6414, 2010), design engineers investigated the trend in the design of social robots. Using a random sample of 106 social robots obtained through a Web search, the engineers found that 63 were built with legs only, 20 with wheels only, 8 with both legs and wheels, and 15 with neither legs nor wheels. This information is portrayed in the accompanying graphic.
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What type of graph is used to describe the data?
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Identify the variable measured for each of the 106 robot designs.
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Use the graph to identify the social robot design that is currently used the most.
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Compute class relative frequencies for the different categories shown in the graph.
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Use the results from part d to construct a Pareto diagram for the data.
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