tukey-tweak

1 files changed, 1 insertions, 1 deletions

diff --git a/ministat.c b/ministat.c
index 2a3afe6..3d2b5b1 100644
--- a/ministat.c
+++ b/ministat.c
@@ -214,7 +214,7 @@ tukey(struct dataset *ds, int *low, int *high)
 	int range = *high - *low;
 	int mid = range / 2 + *low;
 	double iqm = (ds->points[mid] + ds->points[ds->count - mid - 1]) / 2;
-	double iqr = ds->points[(3*range+3)/4 + *low] - ds->points[range/4 + *low];
+	double iqr = ds->points[3*range/4 + *low] - ds->points[(range + 3)/4 + *low];
 	double lower = iqm - 1.5 * iqr;
 	double upper = iqm + 1.5 * iqr;
 	int shrunk = 0;