A research study begins by separating a sample of 40-year-old men into two groups: a high-income group and a low-income group. A score measuring alcohol use is then obtained for each man. The study intends to determine whether there is a relationship between income and alcohol use. This study is an example of the ……………………..research strategy.
a. descriptive
b. correlational
c. experiment
d. nonexperimental
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