Answer:
The type of sampling used in Jankowski's study of gangs is Option D. Stratified sampling.
Explanation:
With stratified sampling, the researcher will partition the population into different groups, usually based on some characteristic that is common to that group. In this case, it was the different kinds of gang membership. Then, the researcher will take a sample of people within each specific group using another sampling method like simple random sampling for instance. The groups that are used in stratified sampling are called strata. Another example would be a national survey that is divided into strata of the different major ethnic groups that comprise the national population.
Answer:
These 21st-century skills are more important to students now than ever before. They not only provide a framework for successful learning in the classroom, but ensure students can thrive in a world where change is constant and learning never stops. And they are also tremendously important for our nation's well being.
Answer:
B > Voluntary trade involves two parties, both of which agree freely to making a trade
