The task of analytical chemistry 18

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Analyst obtained the following data about the content of alcohol in blood ethanol ( % ) 0,084; 0,089; 0,079. Calculate the confidence interval for the mean at a confidence level of 95%, assuming that 1) the reproducibility of the method is not known and 2) on the basis of the preliminary .experiences known value S = G = 0.005% ethanol.

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