one research study of illegal drug use among 12-17 year olds reported
one research study of illegal drug use among 12-17 year olds reported a decrease in use (from 11.4% in 1997) to 9.76% now. Suppose a survey in a large high school reveals that, in a random sample of 1050 students, 98 report using illegal drugs. Use a 0.05 signifigance level to test the principal’s claim […]