3. Carry out a complete statistical mathematical processing of the results of the photometric determination of beryllium in a standard sample (according to the passport x0 = 2.12%); at which the following data were obtained (n=13); (2.05)3; 2.09; (2.12)3; 2.16; (2.18)3; 2.19; 2.25%. (the index at the bottom is the number of experiments that gave such a result).

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