diff --git a/Week03/shifted_mustafa_uysal.py b/Week03/shifted_mustafa_uysal.py
new file mode 100644
index 00000000..3bd1e347
--- /dev/null
+++ b/Week03/shifted_mustafa_uysal.py
@@ -0,0 +1,8 @@
+def shifted(data):
+    n = len(data)
+    if n == 0: return 0
+    mean = sum(data) / n
+    s = sorted(data)
+    median = s[n // 2] if n % 2 == 1 else (s[(n // 2) - 1] + s[n // 2]) / 2
+    if mean == 0: return 0
+    return (abs(mean - median) / abs(mean)) * 100