Author Question: African Americans constitute what percentage of the U.S. population? a. 5 percent b. nearly 13 ... (Read 88 times)

oliviahorn72 · **on:** Jul 9, 2018

African Americans constitute what percentage of the U.S. population?

a. 5 percent
b. nearly 13 percent
c. approximately 20 percent
d. more than 25 percent

Question 2

What is the difference between random sampling and stratified sampling?

a. Stratified sampling combines random selection with predetermined weighting of a population's demographic characteristics.
b. Stratified sampling gives each member of a targeted population the same probability of being polled, whereas simple random sampling does not.
c. Random sampling incorporates random selection into the polling procedure, whereas stratified sampling allows for self-selection.
d. Stratified sampling relies on techniques to minimize bias, whereas simple random sampling does not.