/** Test of getVariance method, of class GeneralDiscrete. */ @Test public void testmeanandvar() { System.out.println("test mean and variance"); Map<Integer, Double> pdf = new HashMap<Integer, Double>(2); pdf.put(1, 0.5); pdf.put(3, 0.5); GeneralDiscreteRandomVariable dist = new GeneralDiscreteRandomVariable(pdf); assertEquals(2.0, dist.mean(), 0.000001); assertEquals(1.0, dist.variance(), 0.000001); }