@Test
public void meanOfLargerSequence() {
Statistician s = new Statistician();
s.nextNumber(2.0);
s.nextNumber(2.0);
s.nextNumber(2.0);
assertEquals(2.0, s.getMean(), 0.0001);
}
@Test
public void meanOfSmallSequence() {
Statistician s = new Statistician();
s.nextNumber(1.1);
assertEquals(1.1, s.getMean(), 0.0001);
}
@Test
public void meanOfAnEmptySequence() {
Statistician s = new Statistician();
assertEquals(Double.NaN, s.getMean(), 0.0001);
}