Update standard-deviation.md

2017-12-13 23:12:42 +11:00
parent ddd72538f1
commit eb817e71d2
1 changed files with 1 additions and 1 deletions
--- a/snippets/standard-deviation.md
+++ b/snippets/standard-deviation.md
@ -7,7 +7,7 @@ NOTE: This is **population standard deviation**. Use `/ (arr.length - 1)` at the
 calculate **sample standard deviation**.

 ```js
-const standardDeviation = (arr, val) =>
+const standardDeviation = arr =>
  Math.sqrt(
    arr.reduce((acc, val) => acc.concat(Math.pow(val - arr.reduce((acc, val) => acc + val, 0) / arr.length, 2)), [])
       .reduce((acc, val) => acc + val, 0)