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Posted by David Whitehouse on July 03, 1998 at 10:05:45:
I cannot seem to find the margin of error for surveys run at the 90% confidence level. Specifically, assuming an "infinite" universe, what is the margin of error for a sample size of 100 and for a sample size of 150? (Please assume a survey result of 50%.)
If anyone can guide me to someplace that contains a calculator for calculating margins of error based on different confidence levels, that would also be helpful.
As always, thanks for your help.
Subject: Re: Confidence levels / Margin of error