Answer:
<u>Cluster sampling</u>
Explanation:
cluster sampling is also called a simple random sampling.
In this sampling, the researchers, select the variable either by simple random sampling or systematic random sampling. the researcher just not to includes the sub-part of sampling but even can include the main sampling in it. in this sampling, the researcher used a geographical cluster to do the sampling in a population.
For example, if a researcher wants to sample n an academic population:
- firstly the researcher divides the population in sub-part
- then researcher select several clusters depends on his research through a systematic random sampling
- from this sampling, the researcher chooses the population with selected subjects through random sampling.
Not much is known about how the earliest civilizations adapted to their environments except through their cultural habits (i.e. religion, games, etc). The Mayans took advantage of the surrounding rain forests and developed a very heavy agricultural and farming civilization, focusing in the cultivation of maize, beans, squash, peppers, avocado, and other important foods. They created a system for tearing down the rain forest in order to make room for their fields and left the watering of the plants up to the gods as they believed that the sun and rain were entirely divine. The Aztecs, however, settled in a more marshy land that was difficult to cultivate. Instead, they relied on military power and strength to conquer other civilizations and steal their food to keep their civilization alive. They did a bit of growing on their own, but not to the same scale as the Mayans, developing water ways and canals to transport goods from conquered cities to their capital.
There is a cost of attending a college. The money and time that you spend on your education is an opportunity cost. You could the same amount of money and time for something else. What else could you do? What kind of lifestyle could you choose? What carrier would you have? All of these questions bear the concept of opportunity cost in this context.
It is absolutely ethical to charge those with lower incomes less money, and those with higher incomes more money.
