diff --git a/Week03/shifted_RIZA_ARSLAN.py b/Week03/shifted_RIZA_ARSLAN.py
new file mode 100644
index 00000000..0bb4219d
--- /dev/null
+++ b/Week03/shifted_RIZA_ARSLAN.py
@@ -0,0 +1,6 @@
+def shifted(data):
+    if not data or sum(data) == 0: return 0.0
+    ortalama = sum(data) / len(data)
+    sirali = sorted(data)
+    medyan = (sirali[len(data) // 2] + sirali[~(len(data) // 2)]) / 2
+    return (abs(ortalama - medyan) / abs(ortalama)) * 100