Jumabayev A.A. Джумабаев А.А., and Serikov B.F. Сериков Б.А. 2023. “Issues of Improving the Quality of Education on the Basis of Analysis of Variance”. Рroblems of Engineering and Professional Education 55 (4):39. https://doi.org/10.32523/2220-685X-2019-55-4-39.