Navarro, ClaudiaClaudiaNavarroStehlik, MilánMilánStehlikZachary R. KuenstlerBrennan C. MerleyJerzy K. FilusLidia Z. FilusJean Paul MaidanaFélix Fuders2025-08-252025-08-252023-01-0110.1007/978-3-031-39864-3_102-s2.0-85180549524https://cris-uv-2.scimago.es/handle/123456789/6096Here we analyze several economical variables which have been affected by the period of COVID-19. In particular, EUR/US exchange rates are addressed. Oil prices have been very volatile and many other economical variables have changed their behavior. We show by application of statistical tests for normality, including QQ-plots and Shapiro-Wilk that exchange rates of EUR to US from 10/13/2019 to 4/9/2020 are substantially deviating from normality and outliers are present. It is clear that changes to the economical variables have been of interest.enacceso restringidoMathematicsconference paper