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

One research study of illegal drug use among 12-17 year olds reported a decrease in use (from 11.4% in 1997) to 9.7% now. Suppose a survey in a large high school reveals that, in a random sample of 1052 students, 99 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.

1) Z score:

2) P value

3) Is there significant evidence to support the claim that illegal drug use is below national average?
Math   Statistics-And-Probability   
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