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One research study of illegal drug use among​ 12- to​ 17-year-olds

/in /by

One research study of illegal drug use

among​ 12- to​ 17-year-olds reported a decrease in use​ (from 11.4% in​ 1997) to 9.8

9.8​% now. Suppose a survey in a large high school reveals​ that, in a random sample of 1 comma 057

1,057 ​students, 93

93 report using illegal drugs. Use a 0.05 significance level to test the​ principal’s claim that illegal drug use in her school is below the current national average.

 
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