The results of an evaluation of the drinking water quality in Pakistan was reported in Drinking Water

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The results of an evaluation of the drinking water quality in Pakistan was reported in Drinking Water Engineering and Science (Vol. 6, 2013). Due to high levels of fluoride in the drinking water, Pakistanis are susceptible to fluoride toxicity (fluorosis)—which occurs when the fluoride level exceeds 1.5 milligrams per liter of water (mg/l). Water specimens were collected from various surface or groundwater sources (e.g., hand pumps, wells, springs, dams, etc.) of major cities of the country. The table gives the results for two cities—Lahore and Faisalabad. Is there evidence to indicate that the fraction of water specimens that exceed 1.5 mg/l of fluoride differs for the two cities? Test using α = .10.

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Statistics For Engineering And The Sciences

ISBN: 9781498728850

6th Edition

Authors: William M. Mendenhall, Terry L. Sincich

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