public void TwoSampleZTestConstructorTest2()
{
// Example from http://www.stat.purdue.edu/~tlzhang/stat511/chapter9_1.pdf
double mean1 = 29.8;
double var1 = System.Math.Pow(4.0, 2);
int samples1 = 20;
double mean2 = 34.7;
double var2 = System.Math.Pow(5.0, 2);
int samples2 = 25;
TwoSampleZTest target = new TwoSampleZTest(
mean1, var1, samples1,
mean2, var2, samples2);
Assert.AreEqual(mean1, target.EstimatedValue1);
Assert.AreEqual(mean2, target.EstimatedValue2);
Assert.AreEqual(-3.66, target.Statistic, 0.01);
var range = target.GetConfidenceInterval(0.99);
Assert.AreEqual(-8.36, range.Min, 0.01);
Assert.AreEqual(-1.44, range.Max, 0.01);
Assert.IsTrue(target.Significant);
target.Size = 0.01;
Assert.IsTrue(target.Significant);
}
public TwoSampleHypothesisTestResult TestHypothesis(IEnumerable <double> sample1, IEnumerable <double> sample2, double hypothesizedDifference,
TwoSampleHypothesis alternateHypothesis, double alpha)
{
var test = new TwoSampleZTest(
sample1.ToArray(),
sample2.ToArray(),
hypothesizedDifference: hypothesizedDifference,
alternate: alternateHypothesis);
test.Size = alpha;
return(new TwoSampleHypothesisTestResult(
test.Significant,
test.GetConfidenceInterval(1 - alpha),
test.ObservedDifference));
}
public void TwoSampleZTestConstructorTest2()
{
// Example from http://www.stat.purdue.edu/~tlzhang/stat511/chapter9_1.pdf
double mean1 = 29.8;
double var1 = System.Math.Pow(4.0, 2);
int samples1 = 20;
double mean2 = 34.7;
double var2 = System.Math.Pow(5.0, 2);
int samples2 = 25;
TwoSampleZTest target = new TwoSampleZTest(
mean1, var1, samples1,
mean2, var2, samples2);
Assert.AreEqual(mean1, target.EstimatedValue1);
Assert.AreEqual(mean2, target.EstimatedValue2);
Assert.AreEqual(-3.66, target.Statistic, 0.01);
var range = target.GetConfidenceInterval(0.99);
Assert.AreEqual(-8.36, range.Min, 0.01);
Assert.AreEqual(-1.44, range.Max, 0.01);
Assert.IsTrue(target.Significant);
target.Size = 0.01;
Assert.IsTrue(target.Significant);
}