Abstract
A factor matrix was obtained and using regression equations the connection between the complex quality index and the values of the impact factors was determined. As a regression model, a linear regression quadratic and cubic models were used. It was determined that the most convenient form of noting a mathematical model while performing regression analysis calculations is an equation of a second-order polynomial. The research of the obtained mathematical model is made with the use of the methods of mathematical statistics - dispersion and correlation analyzes. It is proved that the mathematical model adequately describes the research process
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