Fix typo: misleading variable name

Author: heoh

pandas/tests/dtypes/test_inference.py

@@ -1399,11 +1399,11 @@ def test_infer_dtype_period_with_na(self, na_value):
     @pytest.mark.parametrize("na_value", [pd.NA, np.nan])
     def test_infer_dtype_numeric_with_na(self, na_value):
         # GH61621
-        arr = Series([1, 2, na_value], dtype=object)
-        assert lib.infer_dtype(arr, skipna=True) == "integer"
+        ser = Series([1, 2, na_value], dtype=object)
+        assert lib.infer_dtype(ser, skipna=True) == "integer"
 
-        arr = Series([1.0, 2.0, na_value], dtype=object)
-        assert lib.infer_dtype(arr, skipna=True) == "floating"
+        ser = Series([1.0, 2.0, na_value], dtype=object)
+        assert lib.infer_dtype(ser, skipna=True) == "floating"
 
     def test_infer_dtype_all_nan_nat_like(self):
         arr = np.array([np.nan, np.nan])