Var 4 DHS 19.1 Collection Ryabushko:
As a result of the experiment, data recorded in the form of a statistical series were obtained. It is required:
a) record the values ​​of the experimental results in the form of a variation series;
b) find the range of variation and divide it into 9 intervals;
c) construct a frequency polygon, a histogram of relative frequencies and a graph of the empirical distribution function;
d) find the numerical characteristics of the sample x, DB;
e) taking the hypothesis H0 as the null hypothesis: the population from which the sample was extracted has a normal distribution, check it using the Pearson criterion at a significance level of α = 0.025;
f) find confidence intervals for the mathematical expectation and standard deviation with a reliability of γ = 0.9.