How do 12th graders’ frequency of Cocaine /Crack differ by race/ethnicity among students over 18 and students under 18 (age) in the past-month?

Start researching some background literature for your introduction section of the poster.

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How do 12th graders’ frequency of Cocaine /Crack differ by race/ethnicity among students over 18 and students under 18 (age) in the past-month?