The problem is that one does not know if those who do respond are representative of the groups being investigated as the non-responders can be deviating in one or several respects.
The baseline characteristics of patients who did not respond are not available for us to evaluate any systematic differences between responders and non-responders.
Households that do not respond are visited by census-takers.
"If children are under stress, the ways they respond are remarkably similar," she says.
Crews that spot those clues and respond are rewarded by moving onto more complex scenarios.
Mr. Block says enforcement efforts against people who don't respond are quite straightforward.
"The first four contractors who respond are given the name and telephone number of the customer," she said.
The third theory of democratic politics is the theory that the cues to which most voters respond are, in fact, adequate bases on which to form political preferences.
First to respond are the sergeant, James Clarke, a tough 26-year veteran with 17 complaints on his record, and Officer Charles Simmons, his black rookie sidekick.
The one-third of potential interviewees who do respond are either the aforementioned pushables or people eager to make their views known: partisans, activists and the committed.
When you respond, are you using some of the same words and terms that were used in the actual job posting?
