16. The rule of thumb for an adequate sample size is n=30. In what situation would you not be confident with a sample size of 30?

Select an answer:

when a larger sample size is available

when what was tested is a rare occurrence

when what was tested is a common occurrence

17. A classic example of correlation and causation is that increased ice cream sales cause crime. How should your skeptical mind think about this if the data is accurate?

Select an answer:

There is something about summertime, when ice cream sales increase, and not the ice cream itself that leads to more crime.

Provided the sample size is large enough, it is safe to conclude that the ice cream sales cause more crime.

If the data is accurate, then it is reasonable to assume that increased ice cream sales cause crime.

18. Which newspaper headline would cause someone who is professionally skeptical to dive deeper into the article?

Select an answer:

"With interest rates decreasing, home sales are expected to rise."

"Home sales are expected to rise, but buyers are concerned about interest rates."

"With more homes on the market, prices are expected to decrease."