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
Horst Christian Simco (born January 29, 1982), better known by the stage name Riff Raff (often stylized as RiFF RAFF), is an American rapper from Houston, Texas. He was originally managed by Swishahouse co-founder OG Ron C. Then after being associated with Soulja Boy's imprint S.O.D.