statistic - the youth risk

Anonymous
timer Asked: Mar 17th, 2016

Question description

The Youth Risk Behavior Surveillance System (YRBSS) monitors health risk behaviors among U.S. high school students, which include tobacco use, alcohol and drug use, inadequate physical activity, unhealthy diet and risky sexual behavior. Approximately 8% of youth have tried marijuana before reaching age 13 years. How does marijuana use change over the high school years? In 2011, the survey randomly selected 3681 ninth-graders and 3632 twelfth-graders and asked them if they had used marijuana one or more times during the previous 30 days. Of these students, 664 ninth-graders and 1010 twelfth-graders said yes. 

Give a 99% confidence interval for the difference between the proportions of all ninth and twelfth-grade high school students who smoked marijuana at least once in the 30 days prior to the survey.

The 99% confidence interval (±0.0001) is from  to 


Tutor Answer

(Top Tutor) Studypool Tutor
School: Rice University
Studypool has helped 1,244,100 students
flag Report DMCA
Similar Questions
Hot Questions
Related Tags

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors