# Thread: normal distribution, confidence interval

1. ## normal distribution, confidence interval

stuck on a confidence interval question, any help welcome!
an insurance company checks police records on a random sample of 582 automobile accidents and notes that a teenager was driving in the car in 91 of the accidents. create a 95% confidence interval for the percentage of all automobile accidents that involve teenage drivers.
does this answer support the statement that 'in one of every five automobile accidents a teenager is the driver'?

2. i am not sure maybe i have wrong..if answer is (0.12,0.18)i can send my solution way...

3. that's sounds right! someone in my class gave me the answer but i don't have the solution so if you could please post/explain that would be very helpful!
thanks again!

4. Originally Posted by lalalamaths
stuck on a confidence interval question, any help welcome!
an insurance company checks police records on a random sample of 582 automobile accidents and notes that a teenager was driving in the car in 91 of the accidents. create a 95% confidence interval for the percentage of all automobile accidents that involve teenage drivers.
does this answer support the statement that 'in one of every five automobile accidents a teenager is the driver'?
Read post #3 here: http://www.mathhelpforum.com/math-he...-homework.html

The question is identical to yours except for context and numbers.