3. During the standardization of the KMnO4 solution by the Na2C2O4 sample, aliquots of the sample were titrated with the KMnO4 solution. Used for titration: 14.50; 15.00; 15.10; 15.05; 14.95 cm3 KMnO4. Evaluate the suitability of the obtained results for statistical processing using the Q-criterion. For valid data, determine the boundaries of the confidence interval of the average value of the volume of KMnO4 and the relative error of the volume measurement at a confidence level P = 0.95.

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