public GeneralHypothesisTest(string firstLabel, DescriptiveResult sample1, string secondLabel,
DescriptiveResult sample2, double hypothesizedDifference = 0,
TwoSampleHypothesis alternate = TwoSampleHypothesis.ValuesAreDifferent)
{
int samples1 = sample1.Count;
int samples2 = sample2.Count;
HypothesizedDifference = Math.Abs(hypothesizedDifference);
var s1 = new SampleInfo
{
Name = firstLabel,
Count = sample1.Count,
Mean = sample1.Mean,
StdDev = sample1.StdDev
};
var s2 = new SampleInfo
{
Name = secondLabel,
Count = sample2.Count,
Mean = sample2.Mean,
StdDev = sample2.StdDev
};
Result = new ComparisonResult
{
FirstSample = s1,
SecondSample = s2,
Hypothesis = alternate,
HypothesizedDifference = HypothesizedDifference
};
if (samples1 < 30 || samples2 < 30)
{
_tTest = new TwoSampleTTest(sample1, sample2, false, HypothesizedDifference, alternate);
Result.Confidence = _tTest.Confidence;
Result.ObservedDifference = _tTest.ObservedDifference;
Result.Significant = _tTest.Significant;
Result.Size = _tTest.Size;
Result.StandardError = _tTest.StandardError;
}
else
{
_zTest = new TwoSampleZTest(sample1, sample2, HypothesizedDifference, alternate);
Result.Confidence = _zTest.Confidence;
Result.ObservedDifference = _zTest.ObservedDifference;
Result.Significant = _zTest.Significant;
Result.Size = _zTest.Size;
Result.StandardError = _zTest.StandardError;
}
}
public GeneralHypothesisTest(DescriptiveResult sample1, DescriptiveResult sample2,
double hypothesizedDifference = 0,
TwoSampleHypothesis alternate = TwoSampleHypothesis.ValuesAreDifferent)
: this("first", sample1, "second", sample2, hypothesizedDifference, alternate)
{
}