Three measurements of a pollutant upgradient of a landfill yield a mean of 15.4 mg/L and a
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Three measurements of a pollutant upgradient of a landfill yield a mean of 15.4 mg/L and a standard deviation of 2.8 mg/L. Five measurements made downgradient of the landfill result in a mean of 29.1 mg/L and a standard deviation of 7.4 mg/L. Is it safe to conclude that the landfill contributes to increasing the pollutant level in the groundwater?
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Related Book For 
Probability Statistics And Reliability For Engineers And Scientists
ISBN: 9781439809518
3rd Edition
Authors: Bilal M. Ayyub, Richard H. McCuen
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