A survey is the most common form of a
d.None of the above
In experimentation, a group of subjects to whom no experimental stimulus is administered and who should resemble the experimental group in all other respects.
A form of nonprobability sampling in which the researcher selects a few subjects who possess the qualities being studied, then asks these subjects to generate the names of others, who are in turn asked to generate names of others.
Questions that are threatening may be answered with a normative response. This is an example of