def __init__(self, parent, surface_manager):
        super().__init__(parent)
        self.surface_manager = surface_manager
        self._set_layout()
p-value for a hypothesis test about the risk ratio.
dataset/ETHPy150Open tuturto/pyherc/src/herculeum/ui/gui/widgets.py/SpellSelectorWidget.__init__--crossover with--dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/stats/contingency_tables.py/Table2x2.riskratio_pvalue