SOLUTION: It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What is the 90% confidence interval of the true proportion of teenage boys who have re

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Question 1041543: It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What is the 90% confidence interval of the true proportion of teenage boys who have received speeding tickets?
A. 0.584 < p < 0.830
B. 0.136 < p < 0812
C. 0.615 < p < 0.805
D. 0.620 < p < 0.780
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
the SE= z*sqrt%28%28p%29%2A%281-p%29%2Fn%29
=1.645*sqrt%28.7%2A.3%2F90%29
=0.0795
(0.6205,0.7795)
This is closest to D.