Let's say I have a population of 5000 people of which the individuals answer a question with a 'yes' or 'no'. I don't have the time to look at all the answers to find out how many yes's and no's there are. Does anyone have the formula's or a reference web page they can direct me to that would provide the formula's for the following:
What sample size is required to have 95% confidence that the yes's are +- 5% of ____%?
I will alter the parameters to get different deviations and confidence intervals.
Much much appreciated. I need this for validating data in a target database but it has been so long since I have had to do these calculations that I can't remember and I have had no luck finding this on the internet.
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Adrian in Vancouver
What sample size is required to have 95% confidence that the yes's are +- 5% of ____%?
I will alter the parameters to get different deviations and confidence intervals.
Much much appreciated. I need this for validating data in a target database but it has been so long since I have had to do these calculations that I can't remember and I have had no luck finding this on the internet.
________________
Adrian in Vancouver