docs: improve doctests for ndarray instances in stats/base/ndarray/dcumin
#40063
| Job | Run time |
|---|---|
| 1m 30s | |
| 1m 30s |
stats/base/ndarray/dcumin
#40063
| Job | Run time |
|---|---|
| 1m 30s | |
| 1m 30s |