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To test the accuracy of a method for detecting arsenic species in water, 0.40 mg of...

To test the accuracy of a method for detecting arsenic species in water, 0.40 mg of arsesnic was added to each of seven 1-L pure water samples that contained no arsenic. The seven water samples were measured to contain 0.39, 0.40, 0.38, 0.41, 0.36, 0.35, and 0.39 mg/L, respectively. (a) What is the percent recovery of the spiked samples, (b) based on the limited number of measurements, what is the bias of the method, and (c) what is the percent relative standard deviation (Coefficient of Variation) for this set of samples?

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