20.3 Mathematical statistics

Problem: Consider a random sample \( X_{i} \) from some known distribution. Plot the histogram and a frequency polygon based on the sample, the number of intervals is \( K \). Numerical data: \[ \begin{array}{l} i_{1}=-0,036 ; i_{2}=-0,809 ; i_{3}=0,315 ; \\ i_{4}=-0,265 ; i_{5}=0,471 ; i_{6}=-0,386 ; i_{7}=0,576 ; \\ i_{8}=-0,556 ; i_{9}=0,508 ; i_{10}=0,477 ; K=3 . \end{array} \]