model = Linear mixed-effects model fit by ML Model information: Number of observations 231 Fixed effects coefficients 2 Random effects coefficients 0 Covariance parameters 1 Formula: freq ~ 1 + genotype Model fit statistics: AIC BIC LogLikelihood Deviance 454.55 464.88 -224.28 448.55 Fixed effects coefficients (95% CIs): Name Estimate SE tStat DF pValue Lower Upper {'(Intercept)' } 4.405 0.069296 63.567 229 1.7899e-147 4.2684 4.5415 {'genotype_wt_dual'} -0.28177 0.087164 -3.2326 229 0.0014073 -0.45351 -0.11002 Random effects covariance parameters (95% CIs): Group: Error Name Estimate Lower Upper {'Res Std'} 0.63888 0.5832 0.69987