Median calculated in current version of 'ministat' utility isn't correct.
It works properly is a data source contains odd number of data points. If
the data source holds even number of data points, value is wrong. It should
be calculated by adding two middle elements and dividing them by 2.

-- 
Wojciech A. Koszek
dunstan@FreeBSD.czest.pl

--- ministat.c.orig	Sat Feb  4 21:34:54 2006
+++ ministat.c	Sun Feb  5 01:07:06 2006
@@ -200,15 +200,26 @@
 static double
 Median(struct dataset *ds)
 {
-	int i;
-	struct point *pp;
+	int even, i;
+	struct point *p1, *p2;
 
-	i = ds->n / 2;
-	TAILQ_FOREACH(pp, &ds->list, list) {
-		if (i--)
-			continue;
-		return (pp->val);
+	if ((ds->n % 2) == 1) {
+		i = (ds->n / 2) + 1;
+		even = 0;
+	} else {
+		i = ds->n / 2;
+		even = 1;
 	}
+	TAILQ_FOREACH(p1, &ds->list, list) {
+		--i;
+		if (i == 0)
+			break;
+	}
+	if (even) {
+		p2 = TAILQ_NEXT(p1, list);
+		return ((p2->val + p1->val) / 2);
+	}
+	return (p1->val);
 }
 
 static double