Answer: They are useful when a researcher is attempting to STUDY PEOPLE OR SITUATIONS THEY MIGHT NOT OTHERWISE HAVE ACCESS TO.
As can be inferred from the definition of Observational study, in which it is a research that the researcher have no control/influence over due to logistical restrictions or ethical reasons. This means that they will be especially useful when the researcher have no access to the participants.
I have two.
by planning a trip
and
for example, moving somewhere
Answer:
experimental
Explanation:
According to my research on different research methodology, I can say that based on the information provided within the question the best method for answering this question would be experimental. This is because until she conducts an experiment by testing both the hot and cold effects she will not know which one affects sales more, or even if they affect sales at all.
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Religion also played a major role in shaping some local cultures; many people who colonized North America were fleeing religious persecution in their home country and implemented strict religious-based rules in the colonies where they settled.