In order to discover the causes of changes in marijuana use among high school seniors, a researcher would have to use a(n) _______________ survey to obtain the type of data needed.

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An explanatory survey is designed to uncover the reasons or causes behind a particular phenomenon, which is exactly what the researcher is attempting to do in this case by trying to understand the causes of changes in marijuana use among high school seniors. Detailed, stratified, and descriptive surveys may provide useful information, but they do not necessarily explore the underlying causes of a given trend or behavior.

In Order to Discover the Causes of Changes in Marijuana