A High Correlation Between Two Variables Does Not Always Mean

question 12

Multiple Choice

A high correlation between two variables does not always mean that changes in one cause changes in the other. The best way to get good evidence that cause-and-effect is present is to

• A) select a simple random sample from the population of interest.
• B) arrange the data in a two-way table.
• C) carry out a randomized comparative experiment.
• D) make a scatterplot and look for a strong association.
• E) make a histogram and look for outliers.

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