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One research study of illegal drug use among​ 12- to​ 17-year-olds reported a decrease in use​...

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​% now. Suppose a survey in a large high school reveals​ that, in a random sample of 1,052 ​students, 95 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.

Formulate the null and alternative hypotheses.

Find the test statistic.

z=

P-value=

Now make a conclusion:

A. There is not sufficient evidence to support the claim that illegal drug use is below the national average.

B. There is not enough information to make a conclusion.

C. There is sufficient evidence to support the claim that illegal drug use is below the national average.

math   Statistics-And-Probability   
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