Question
In: Statistics and Probability
The national health organization warns that 30% of the middle school students nationwide have been drunk....
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The national health organization warns that 30% of the middle school students nationwide have been drunk. A local health agency randomly and anonymously surveys 100 of the middle school students in its city and finds that only 21 of them report having been drunk. |
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Create a 95% confidence interval for the proportion of the city's middle school students who have been drunk. |
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Is there any reason to believe that the national level of 30% is not true for the middle school students in the city? Test at 1% significance level. |
Solutions
orchestra answered 1 year agoRelated Solutions
A national health organization warns that 30% of middle school students nation wide have been drunk....
A national health organization warns that 30% of middle school
students nation wide have been drunk. A local health agency
randomly surveys 100 students and only 25 report having been drunk.
Construct an appropriate 80% confidence interval.
A. 0.25
B. 0.0555
C. 0.1946 to 0.3055
D. 0.1651 to 0.3349
Please show work and exaplain why. Thank you!
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