Variance v = new Variance(m4);
Skewness s= new Skewness(m4);
Kurtosis k = new Kurtosis(m4);
for (int i = 0; i < testArray.length; i++){
m4.increment(testArray[i]);
}
assertEquals(mean,m.getResult(),tolerance);
assertEquals(var,v.getResult(),tolerance);
assertEquals(skew ,s.getResult(),tolerance);