diff --git a/statistical-inference.org b/statistical-inference.org
index 6af77ca..7e892f1 100644
--- a/statistical-inference.org
+++ b/statistical-inference.org
@@ -110,7 +110,7 @@
 
 ** Sampling Distributions                                            :slide:
 
-+ $Standard.error = \frac{\sigma}{\sqrt{mean}}$
++ $Standard.error = \frac{\sigma}{\sqrt{n}}$
 
 
 |                                    Variable | Value |
@@ -124,7 +124,6 @@
 
 
 
-
 * Introduction to Hypothesis Testing
 ** Transforming the Distribution to Standard Normal                  :slide: