public void Merge(Pearsons Group)
{
this.sumOfFirst += Group.SumOfFirst;
this.sumOfSecond += Group.SumOfSecond;
this.sumOfSquaresOfFirst += Group.SumOfSquaresOfFirst;
this.sumOfSquaresOfSecond += Group.sumOfSquaresOfSecond;
this.coProduct += Group.CoProduct;
}