Frame benchmarking sum instead of mean (pandas-dev#14824)

Author: mroeschke

asv_bench/benchmarks/frame_methods.py

@@ -299,7 +299,7 @@ def time_apply_axis_1(self):
         self.df.apply((lambda x: (x + 1)), axis=1)
 
     def time_apply_lambda_mean(self):
-        self.df.apply((lambda x: x.sum()))
+        self.df.apply((lambda x: x.mean()))
 
     def time_apply_np_mean(self):
         self.df.apply(np.mean)