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
A motif is a recurring pattern in a writing work that helps to strengthen the main theme. It can be concrete or symbolic and keeps showing up reinforcing the ideas or underlying theme. A motif can be a subject, an idea, an image or event that the writer introduces at regular intervals to highlight certain events or ideas.