1. In scientific polling, what is the relationship between the universe, a representative sample, and random sampling? 2. What may happen when a public official goes too far in using polling data?
3. How may the use of polling data by the media influence voter decisions?

What is the main difference between primary and secondary sources? a. primary sources are historical documents, and secondary sources are modern-day documents. b. primary sources are derived from museums and archives, and secondary sources are created by history students and academics. c. primary sources are found in ancient places with a rich history, and secondary sources are found in historical journals and blogs. d. primary sources are created during a particular historical era, and secondary sources are created by studying primary sources.