That arises from inaccurate sampling frame, data clarification or verification methods, reporting or coding of data, and/or specifications. It may also arise from poorly designed survey questionnaires, improper sample allocation and selection procedures, and/or errors in estimation methodology.
riff (rÉªf) n. 1. an ostinato melodic phrase accompanying a soloist in jazz or rock music. 2. any variation or improvisation, as on an idea. v.i. 3. to perform a riff. [1930â35; perhaps alter. of refrain 2] riff Past participle: riffed Gerund: riffing
RIFF-it good. A light in the room. It was you who was standing there. Tried it was true. As your glance met my stare. But your heart drifted off. Like the land split by sea. I tried to go, to follow. To kneel down at your feet. I'll run. I'll run.