diff --git a/Week03/shifted_efe_ozdemir.py b/Week03/shifted_efe_ozdemir.py
new file mode 100644
index 00000000..2c93d275
--- /dev/null
+++ b/Week03/shifted_efe_ozdemir.py
@@ -0,0 +1,9 @@
+def shifted(sample):
+    s = sorted(sample)
+    n = len(s)
+    avg = sum(s) / n
+    med = s[n // 2] if n % 2 else (s[n // 2 - 1] + s[n // 2]) / 2
+
+    if avg == 0:
+        return 0
+    return abs(avg - med) / abs(avg) * 100