data recorded in a statistical result of a number obtained in the experiment. Requires:
a) record the value of the experimental results in the form of an ordered series;
b) Find the magnitude of variation and break it down into 9 intervals;
c) build a frequency polygon, a histogram of the relative frequency and schedule of the empirical distribution function;
d) find the numerical characteristics of the sample x, DB;
d) taking as the null hypothesis H0: the general population from which the sample is extracted, has a normal distribution, check it out using the criterion of Pearson with a significance level of α = 0,025;
e) find the confidence intervals for the mean and standard deviation with the reliability of γ = 0,9.

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