Final answer:
Correlation indicates a statistical association between two variables without establishing a cause-and-effect relationship, while causation denotes one variable directly causing another to change. For example, while stork populations correlate with birth rates, this does not mean storks deliver babies (correlation), whereas smoking is a proven cause of lung cancer (causation).
Step-by-step explanation:
The difference between correlation and causation is critical when analyzing data and concluding. Correlation suggests a connection between two variables, where a change in one variable is associated with a change in the other. However, this does not mean one variable causes the other to change. By contrast, causation demonstrates a direct cause-and-effect relationship where one variable is responsible for the change in the other.
For example, a positive correlation between the number of storks and the human birth rate does not mean storks are responsible for delivering babies (correlation). Conversely, smoking causing lung cancer is a causation because research has established smoking as a direct cause of lung cancer.
Observational studies can establish correlations by showing associations between variables, but they cannot confirm causation since not all variables are controlled. Experiments, where variables are controlled, can be used to establish causation. It is important to remember that just because two variables display a correlation, it should not be assumed that one causes the other without further experimental evidence.