compare has a syntax error where it is missing the path to sem().

bin/compare

Index: bin/compare
diff --git a/bin/compare b/bin/compare
index 95d4100e950a22182ed3e58e15913f3e1611e4c1..794cb724e0713f30e554d3e1099559f6edeceef5 100755
--- a/bin/compare
+++ b/bin/compare
@@ -45,7 +45,7 @@ for key in common:
     am, bm = m(a[key]), m(b[key])
     if have_scipy:
         _, p = scipy.stats.mannwhitneyu(a[key], b[key])
-        asem, bsem = scipy.stats.sem(a[key]), sem(b[key])
+        asem, bsem = scipy.stats.sem(a[key]), scipy.stats.sem(b[key])
     ps.append((bm/am, p, key, am, bm, asem, bsem))
 ps.sort(reverse=True)