TY  JOUR
TI  Application of the Pearson and Shapiro — Wilk Tests to Assess the distribution of Stock Returns of Large Oil and Gas Issuers
KW  normal distribution
KW  financial risks
KW  market return
KW  Shapiro — Wilk test
KW  Pearson test
KW  null hypothesis
KW  significance level
KW  deviation
JO  Scientific Research and Development. Economics
AU  Averina, T.N.
AU  Seitova, L.P.
PY  2026
IS  14
PB  INFRA-M Academic Publishing LLC.