What type of sampling selects people with the desired characteristics until the desired number is reached?

Which of the following statements about the effects of changing technology on campaigns is true?

A) The large number of cable television channels allows politicians to communicate with many more citizens. B) Candidates have more trouble getting their names in the media. C) Constant news coverage creates more quality information provided about candidates. D) Web sites have not yet made much impact on campaigning. E) New technology has had no real visible effect.

Most voters self-identify themselves as Independent due to the _____________ in the electorate

Fill in the blank(s) with correct word