Variance estimation fixed.

diff --git a/misc/ips.c b/misc/ips.c
index ec7e673ee8a0b6a752e67b9a2fdc8224de06de26..7ea6c71b3db77f53409832c1dc853e0b4a2013cb 100644 (file)
--- a/misc/ips.c
+++ b/misc/ips.c
@@ -78,7 +78,7 @@ main(int argc, char **argv)
        int min=cnt, max=0, zer=0;
        double delta=0;
        double avg = (double) cnt / z;
-       double exdelta = avg*(1-1/z);
+       double exdelta = avg*(1-1/(double)z);
        double exzer = exp(-avg);
        for(i=0; i<z; i++) {
                if (h[i] < min) min=h[i];