Why would it be important to have a true representative sample when talking about public opinion ?

What was the most common destination for african american migrants between 1910 and 1930

How did bacon's rebellion affect relations between colonists and native americans? a. relations improved after many were disgusted by the violence of the rebellion.b. after the rebellion, colonists placed less focus on the "indian problem."c. the rebellion showed many that in order to establish better relations between colonists and native americans,  slavery  had to be legalized.d. more colonists supported an armed expansion into native american territory.

Richard nixon was born in california. fact or opinion