To Add Arithmetic Mean function in maths/series

maths/series/maths/series/arithmetic_mean.py

@@ -0,0 +1,48 @@
+"""
+The Arithmetic Mean of n numbers is defined as the sum of the numbers
+divided by n. It is used to measure the central tendency of the numbers.
+https://en.wikipedia.org/wiki/Arithmetic_mean
+"""
+
+
+def compute_arithmetic_mean(*args: float) -> float:
+    """
+    Return the arithmetic mean of the argument numbers.
+    If invalid input is provided, it prints an error message and returns None.
+
+    >>> compute_arithmetic_mean(1, 2, 3, 4, 5)
+    3.0
+    >>> compute_arithmetic_mean(5, 10)
+    7.5
+    >>> compute_arithmetic_mean('a', 69)
+    'Error: Not a Number'
+    >>> compute_arithmetic_mean()
+    'Error: At least one number is required'
+    >>> compute_arithmetic_mean(2.5, 3.5, 4.0)
+    3.3333333333333335
+    """
+    try:
+        if len(args) == 0:
+            raise ValueError("At least one number is required")
+
+        total = 0
+        count = 0
+        for number in args:
+            if not isinstance(number, (int, float)):
+                raise TypeError("Not a Number")
+            total += number
+            count += 1
+
+        return total / count
+
+    except (TypeError, ValueError) as error:
+        return f"Error: {error}"
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod(name="compute_arithmetic_mean")
+    print(compute_arithmetic_mean(1, 2, 3, 4, 5))
+    print(compute_arithmetic_mean("a", 69))
+    print(compute_arithmetic_mean())