README.md in flash_extensions-3.1.1 vs README.md in flash_extensions-3.2.0

@@ -152,10 +152,18 @@
 [1,2,3].several? #=> true
 [1,1,3,3].several?(&:even?) #=> false
 [].several? #=> false
 ```
 
+####Standard Deviation:####
+Use the `standard_deviation` method to return the standard deviation of elements of a collection.
+
+```ruby
+[1,2,6].variance #=> 2.6457513110645907
+[].variance #=> nil
+```
+
 ####Sum:####
 Use the `sum` method to to return the sum of a collection of numbers.
 
 ```ruby
 [1,2,3].sum #=> 2
@@ -176,9 +184,17 @@
 Use the `take_last_while` method to return the last number of elements of a collection while it meets a criteria.
 
 ```ruby
 [1,2,3,5].take_last_while(&:odd?) #=> [5, 5]
 [].take_last_while(&:odd?) #=> []
+```
+
+####Variance:####
+Use the `variance` method to return the variance of elements of a collection.
+
+```ruby
+[1,2,6].variance #=> 7
+[].variance #=> nil
 ```
 
 ### HashExtensions
 
 ####Except:####
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