N measurements, the probability of each result should be 1/n, so the mathematical expectation of limited measurements should be the average of the measured values: 1000.82 The 95% confidence interval of statistical analysis is (1000.78, 1000.86).

Estimated standard deviation, 0.047, 95% confidence interval (0.03 1, 0.096).

Note: The above results are calculated by MINITAB.