Wordpress uses a number of status types for posts and those status types are retrieved and displayed in the left column of the above two column list. The process of assigning values is as per post types to content types.

These Wordpress types correspond to the Drupal published information. Your only choices are either the corresponding status type is either published or not.

If all the content type, promote to front page and published information has been input then the 'Import' button will become active. At this point the conversion can take place.