// Define the Likelihood ratio for the
        // problem under study.
        protected internal override double GetLikelihoodRatio(
            DoubleMatrix samplePoint,
            DoubleMatrix nominalParameter,
            DoubleMatrix referenceParameter)
        {
            var x = samplePoint;
            var u = nominalParameter;
            var v = referenceParameter;

            var ug = new GaussianDistribution(u[0], u[1]);
            var vg = new GaussianDistribution(v[0], v[1]);

            return(ug.Pdf(x[0]) / vg.Pdf(x[0]));
        }