# Chapter 1. Association Does Not Imply Causation

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Stat Tutor
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2:52

### Question 1.1

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Incorrect. A larger fire requires more firefighters to put it out and it also causes more damage.
Correct. A larger fire requires more firefighters to put it out and it also causes more damage.
Incorrect. Try again.
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4:45

### Question 1.2

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Incorrect. We always say that association is not causation. An “r” value close to +1.0 might be the result of a lurking variable and not the X variable.
Correct. We always say that association is not causation. An “r” value close to +1.0 might be the result of a lurking variable and not the X variable.
Incorrect. Try again.
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### Question 1.3

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Incorrect. In order to establish causation, we need an experiment. If we can’t perform an experiment, then there are several other criteria that must be met before we can conclude causation.
Correct. In order to establish causation, we need an experiment. If we can’t perform an experiment, then there are several other criteria that must be met before we can conclude causation.
Incorrect. Try again.
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6:23

### Question 1.4

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Incorrect. This is a correct statement.
Correct. This is a correct statement.
Incorrect. Try again.
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