Answer:
Researchers typically use random assignment.
Explanation:
Random assignment is when a researcher uses chance to make sure all participants have the <em>same opportunity to be in either group</em> during an experiment. It is used to decide in which group the now selected participants will be in.
An example of random assignment is the<em> flip of a coin. </em>
It all depending on the type of information that you want to get.
for example, if you want to obtain quantitative data, you need to use the model that are realisticly allow you to count a certain type of information from the subjects. If you want to obtain qualitative data, direct observations or field works would probably be the best model.
The Trustees asked the House of Commons to replace the Act of 1735 with one that would permit slavery in Georgia as of January 1, 1751.