Merge pull request #11 from pragone/patch-1

Update westrum-cultural-survey.md

Author: developher-net

_kpis/westrum-cultural-survey.md

@@ -14,7 +14,7 @@ This is a simple survey which can be performed periodically to establish trends
 5. On my team, failure caused enquiry.
 6. On my team, new ideas are welcomed.
 
-## Forumla
+## Formula
 Scoring this is simply a matter of averaging the values from the responses.
 
 <img src="https://latex.codecogs.com/gif.latex?S&space;=&space;\frac{A_{1}&space;&plus;&space;A_{2}&space;&plus;&space;...&plus;&space;A_{6}}{6}" title="S = \frac{A_{1} + A_{2} + ...+ A_{7}}{6}" />