english: Different forms of non-response adjustment are possible when researchers have information about non-respondents (Kalton and Flores-Cervantes 2003; Smith 2011).
non_english: Macem-macem formulir saka imbuhan non-nanggepi sing bisa nalika peneliti duwe informasi babagan non-penjawab (Kalton and Flores-Cervantes 2003; Smith 2011) .