51. Solving a chemistry problem

2. To assess the reproducibility and correctness of the analysis method, the sample of the DL-methionine preparation was carefully analyzed by the method of non-aqueous potentiometric titration and the W content (mass fraction) of the main substance in five parallel determinations was found to be equal,%: 99.900; 99.910; 99.910; 99.920; 99,930. The true content of the main substance in the preparation is μ=99.900%. Describe the method of analysis in terms of reproducibility and correctness at a confidence level Р=0.95.