Physics, 02.09.2021 15:50 famouzgal

A breathalyzer is a portable electrochemical instrument that measures the concentration of ethyl alcohol in a sample of exhaled breath. A forensic chemist checks the calibration of a breathalyzer by testing a standard air sample known to contain 0.174 mg/L of ethanol seven times. The average value of these seven replicate measurements is found to be 0.162 mg/L . Calculate the absolute error of the breathalyzer.

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