void calcByRef(double ar2[], int num, double& low, double& high, double& avg, 
												double& median, double& stdDev)
	{
	
	int i, a, b;
	
	double sum;
	
	low = ar2[0];
	
	high = ar2[14];
	
	for(i=0; i<15; i++)
		{
		sum += ar2[i];
		}
	avg = (double)sum / num;
	
	median = ar2[num/2];
	
	for(i=0; i<15; i++)
		{
		sum += i*i;
		a = sum;
		}
		
	for(i=0; i<15; i++)
		{
		sum += i;
		b = sum*sum;
		}
	
	
	stdDev = sqrt ((a - (double)(b/num))/(num -1));
	
	}