According to a study, social robots now outnumber industrial robots worldwide. A
ID: 3255644 • Letter: A
Question
According to a study, social robots now outnumber industrial robots worldwide. A social (or service) robot is designed to entertain, educate, and care for human users. In the study, design engineers investigated the trend in the design of social robots. Using a random sample of 98 social robots obtained through a Web search, the engineers found that 22 were built with legs only, 55 with wheels only, 7 with both legs and wheels, and 14 with neither legs nor wheels. This information is portrayed in the accompanying graph. Complete parts a through e below.
Compute class relative frequencies for the different categories shown in the graph.
Categories: None, Both, Legs only, and Wheels only. (Round to three decimal places as needed)
50 40- o E 30 20 10 14 None Both 55 22 Legs ONLY Wheels ONLYExplanation / Answer
Categories frequencies (no, of Robot) Relative frequencies None 14 0.142857143 Both 7 0.071428571 Leg only 22 0.224489796 Wheels only 55 0.56122449 TOTAL 98 1 14/98 = 0.142857143
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