A zoologist at a large metropolitan zoo is concerned about a potential new disease present among the 243 sharks living in the large aquarium at the zoo. The zoologist takes a random sample of 15 sharks from the aquarium, temporarily removes the sharks from the tank, and tests them for the disease. He finds that 3 of the sharks have the disease. Because the disease affects a shark's ability to extract oxygen from the water, the zoologist also measures the shark's blood oxygen content. The zoologist finds that, on average, shark's blood oxygen content is 4.2%. Your answer has been saved. See score details after the due date. (a) Identify the variable measured on each shark. The shark's blood oxygen count The number of sharks with the disease The proportion of sharks with the disease The shark's ability to extract oxygen from water (b) Is the variable categorical or quantitative? Categorical Quantitative (c) Identify two statistics that the zoologist could use to summarize the variable. Mean or mode Mean or median Mean or proportion Median or proportion (d) Identify one graph that the zoologist could use to summarize the variable. Bar plot Dotplot Scatterplot Line graph