Twelve percent of 900 randomly selected women report using hair coloring. Compute and interpret a 95% confidence interval for the proportion of women who use hair coloring.

I have no idea how to even start this stats problem, also I'm confused because I thought I also need to have the standard deviation in this situation? I'm not sure so if anyone could help me that would be great!

Question

Twelve percent of 900 randomly selected women report using hair coloring. Compute and interpret a 95%  confidence interval for the proportion of women who use hair coloring.

I have no idea how to even start this stats problem, also I'm confused because I thought I also need to have the standard deviation in this situation? I'm not sure so if anyone could help me that would be great!

anonymous · Answer

I know there's also some formula I think I'm supposed to use but I just am really confused on it all.

anonymous · Answer

Mutiply by the reciprocal

anonymous · Answer

No. Lol xD

anonymous · Answer

Just wanted to sound smart.

anonymous · Answer

Well then. That's not right anyways, haha. There's a formula

anonymous · Answer

It's just weird, I couldn't find any examples online that were similar to this one