#assumes incoming column is mmre values (already x 100)

BEGIN {
	IGNORECASE = 1;			# Ignore case in string comparisons.
	FS = ",";				# Initialize the field separator.
	#OFS = ",";				# Initialize the output field separator.
	Pred = 30;				# Initialize the range for Pred.		
}

{
	Mre=$1
	SumMre += Mre;
	SumMreSq += Mre^2;
	if (Mre < Pred) PredN++
}

END {
		Mmre = SumMre/NR;
		Pred30 = 100*PredN/NR;
		SdMre = sd(SumMreSq,SumMre,NR);
		#SdMre = 100*sd(SumMreSq,SumMre,NR);
		#print Mmre, SdMre, Pred30;
		print Mmre, SdMre, Pred30;
		#print Mmre, SdMre;
}

function sd(sumSq,sumX,n) {
	return sqrt((sumSq-((sumX*sumX) / n)) / (n-1))
}