%0 Journal Article %T Application of the Pearson and Shapiro — Wilk Tests to Assess the distribution of Stock Returns of Large Oil and Gas Issuers %A Averina, T.N. %A Seitova, L.P. %K normal distribution, financial risks, market return, Shapiro — Wilk test, Pearson test, null hypothesis, significance level, deviation %J Scientific Research and Development. Economics %D 2026 %N 14 %P 3 %I INFRA-M Academic Publishing LLC.