/// <summary>
/// Return true if within the confidence interval
/// </summary>
public static bool ChiSquaredTest(double confidenceInterval, Instances S, int attributeIndex, int targetAttributeIndex)
{
//attributeIndex = 89;
double threshold = 1 - confidenceInterval;
int df = S.attribute(attributeIndex).numValues() - 1;
double chiSquaredStatistic = ChiSquare.ApproximateChiSquared(S, attributeIndex, targetAttributeIndex);
double pValue = ChiSquareUtils.pochisq(chiSquaredStatistic, df);
Log.LogInfo("ChiSquared pValue is {0} and threshold is {1}", pValue, threshold);
if (Double.IsNaN(pValue))
{
return(false);
}
else
{
bool result = (pValue <= threshold);
return(result);
}
}
