|MadSci Network: Other|
Never had a straight answer on this. Can you help? Assuming that I want to know how many people have a red car in the U.S., how many people would I have to sample in order to be 90% confident of my answer? I suspect that the formula must incorporate a variable that depends on the answer that my sampling returns. I.E. If I sample 100 people and only 1 person has a red car, then my confidence of accuracy must be much lower than if 80 people had a red car. I just need the formula. Thanks for your help. Roy Feinson
Re: calculating confidence rates in samples. (Statistics)
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