diff --git a/experiments/gauss.py b/experiments/gauss.py
index 3b62b43f..f409e20a 100644
--- a/experiments/gauss.py
+++ b/experiments/gauss.py
@@ -36,7 +36,7 @@ def __call__(self, x):
 
 
     def __str__(self):
-        return "(%f, %f)" %(self.mean, self.sigma)
+        return "(%f, %f)" %(self.mean, self.variance)
 
     def stddev(self):
         return math.sqrt (self.variance)