Translations:Advanced Field Epi:Manual 1 - Disease Investigation/323/en

Revisi per 25 Agustus 2014 10.10 oleh FuzzyBot (bicara | kontrib) (Importing a new version from external source)
(beda) ← Revisi sebelumnya | Revisi terkini (beda) | Revisi selanjutnya → (beda)

Selection bias is a systematic error in the way that the samples of study units were drawn from their underlying populations, or in the way that study units were assigned to interventions