public void LeveneTestConstructorTest()
{
// Example from NIST/SEMATECH e-Handbook of Statistical Methods,
// http://www.itl.nist.gov/div898/handbook/eda/section3/eda35a.htm
double[][] samples = BartlettTestTest.samples;
LeveneTest target = new LeveneTest(samples, median: true);
Assert.AreEqual(9, target.DegreesOfFreedom1);
Assert.AreEqual(90, target.DegreesOfFreedom2);
Assert.AreEqual(1.7059176930008935, target.Statistic, 1e-10);
Assert.IsFalse(double.IsNaN(target.Statistic));
}
public void LeveneTestConstructorTest2()
{
double[][] samples =
{
new double[] { 250, 260, 230, 270 },
new double[] { 310, 330, 280, 360 },
new double[] { 250, 230, 220, 260 },
new double[] { 340, 270, 300, 320 },
new double[] { 250, 240, 270, 290 }
};
LeveneTest result = new LeveneTest(samples, true);
Assert.AreEqual(0.7247191011235955, result.Statistic);
Assert.AreEqual(0.58857793222910693, result.PValue);
}
public void LeveneTestConstructorTest3()
{
double[][] samples =
{
new double[] { 50, 10, 12, 42, 125, 21, 62, 13, 66, 200, 54, 32, 64, 13, 65 },
new double[] { 10, 42, 12, 36, 12, 52, 100, 24, 1, 52, 95, 157, 52, 12, 50 }
};
double[] expected =
{
0.0619, 0.0569, 0.0494,
0.0498, 0.0535, 0.0519
};
for (int i = 0; i < 6; i++)
{
double percent = i / 10.0;
LeveneTest result = new LeveneTest(samples, percent);
Assert.AreEqual(expected[i], result.Statistic, 1e-4);
}
}