oo notationo statisticsobjectobjective functionobjective probabilityoblique rotationobservandobservationobservational errorobservational studyobserveroccupancy problemsoccurrence rateoctileodd functionodd numberoddsodds ratio estimatoroff lineoff line quality controloffset normal distributionogiveolmstead tukey test for associationomega distributionomega square testomnibus testone armed bandit problemone dimensional probability distributionone hit modelone sample testone sidedone sided testone tailedone tailed testone third sigma ruleone to one functionone way analysis of varianceone wild distributiononlineopen endopen end classoperating functionoperational characteristic curveoperations researchoperatoropinion pollopinion poolsoptical illusions in chartsoptimal allpcation