Update intro.rst

correct spelling error
Athanaseus · Jan 29, 2018 · 5e09818 · 5e09818
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commit 5e09818
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/doc/intro.rst b/doc/intro.rst
@@ -77,7 +77,7 @@ The coefficient of skewness, the 3-rd moment, is obtained by
 
     SKEWNESS = \frac{m_3}{{m_2}^{\frac{3}{2}}}
 
-If there is a long tail in the positive directin, skewness will be positive,
+If there is a long tail in the positive direction, skewness will be positive,
 while if there is a long tail in the negative direction, skewness will be negative.
 
    .. figure:: https://user-images.githubusercontent.com/16665629/35336554-7ce4953e-0121-11e8-8a14-ce1fbf3eece4.jpg