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Social Studies, 10.12.2021 23:50 kittimau
A researcher is studying the effect of California's decision to raise the age
to buy cigarettes to 21 on teen smoking rates. She measures the teen
smoking rates in California and a few neighboring states, which have a
smoking age of 18, before and after the law was passed. This is known as
what?
O A double-blind study
O A true experiment
A natural experiment
O A correlational study
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A researcher is studying the effect of California's decision to raise the age
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