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.