diff --git a/Math/Statistic/MeasureOfDispersion.php b/Math/Statistic/MeasureOfDispersion.php
index 76d95bef2..551cd1c24 100644
--- a/Math/Statistic/MeasureOfDispersion.php
+++ b/Math/Statistic/MeasureOfDispersion.php
@@ -194,6 +194,7 @@ class MeasureOfDispersion
      */
     public static function getIQR(array $x) : float
     {
+        return 0.0;
     }
 
     /**