Alkalinity of river water. The median alkalinity level of water specimens collected from the Han River in Seoul, South Korea, is 50 milligrams per liter (Environmental Science & Engineering, Sept. 1, 2000). Consider a random sample of 10 water specimens collected from a tributary of the Han River. Suppose that 8 of the 10 alkalinity levels for the sample are greater than 50 mpl. Is there sufficient evidence (at α = .01) to indicate that the population median alkalinity level of water in the tributary exceeds 50 mpl?
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