File talk:Propensity score matching sample.jpg
![]() | This file was nominated for deletion on June 20, 2008 but was kept. If you are thinking about re-nominating it for deletion, please read that discussion first. |
![]() | This file was nominated for deletion on June 20, 2008 but was kept. If you are thinking about re-nominating it for deletion, please read that discussion first. |