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Questions and Answers
When does correlation imply causation?
When does correlation imply causation?
- When variables are linearly related
- When there is a predictive relationship between variables
- Correlation does not imply causation (correct)
- When extreme weather causes people to use more electricity for heating or cooling
What does 'correlation' refer to in statistics?
What does 'correlation' refer to in statistics?
- Only linear relationships between two random variables
- Probabilistic independence of random variables
- Any statistical relationship between two random variables or bivariate data (correct)
- Causal relationship between two random variables
Why are correlations considered useful in statistics?
Why are correlations considered useful in statistics?
- Because they indicate a predictive relationship that can be exploited in practice (correct)
- Because they only refer to linear relationships
- Because they ensure probabilistic independence of random variables
- Because they always imply a causal relationship
Under what condition are random variables considered dependent?
Under what condition are random variables considered dependent?
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What is the informal meaning of 'correlation' in statistics?
What is the informal meaning of 'correlation' in statistics?
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