statsmodels.stats.contingency_tables.Table2x2.riskratio_confint¶ Table2x2.riskratio_confint(alpha=0.05, method='normal')[source]¶ A confidence interval for the risk ratio. Parameters:¶ alpha : float¶1 - alpha is the nominal coverage probability of the confidence interval. method : str¶The method for producing the confidence interval. Currently must be ‘normal’ which uses the normal approximation.