Summary methods
Also written: sum, mean, min, max, count, average
Series methods that boil all values down to one: `.sum()`, `.mean()` (the average), `.min()`, `.max()` and `.count()` (values that aren't missing). They skip NaN.
Also written: sum, mean, min, max, count, average
Series methods that boil all values down to one: `.sum()`, `.mean()` (the average), `.min()`, `.max()` and `.count()` (values that aren't missing). They skip NaN.