Arsenic (a naturally occurring, poisonous metal) in home water wells is a common threat. (a) What sampling
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(a) What sampling method would you use to estimate the arsenic levels in wells in a rural county to see whether the samples violate the EPA limit of 10 parts per billion (ppb)?
(b) Is a census possible?
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Related Book For 
Applied Statistics In Business And Economics
ISBN: 9780073521480
4th Edition
Authors: David Doane, Lori Seward
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