7. When carrying out four parallel determinations of calcium in the sample by complexometric method, the following values of the mass fraction of the determined component were obtained,%: 3.01; 3.04; 3.03; 3.11. Calculate the mean value and present the result as the boundaries of the confidence interval with a confidence probability equal to 0.95

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.