protected ModelTester(IDistribution nullModel, IDistribution altModel)
{
_nullModelDistn = nullModel;
_altModelDistn = altModel;
if (_nullModelDistn != null)
{
int altFreeParams = _altModelDistn.GetParameters(true).CountFreeParameters();
int nullFreeParams = _nullModelDistn.GetParameters(false).CountFreeParameters();
_chiSquareDegreesOfFreedom = altFreeParams - nullFreeParams;
}
}