80. Solving a chemistry problem

80. Solving a chemistry problem

12. In three parallel samples of Mohr´s salt, the mass fraction of FeO (in %) was determined by the permanganometric method: 17.75; 17.95; 18.05. Determine the boundaries of the confidence interval of the mass fraction of FeO at a confidence level Р=0.95 and the relative error in measuring the mass fraction of FeO.

Additional information:

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