Statistical significance

[davywavy]

It's been 15 years since I did any stats work and I'm damned if I can remember how to do it now.

If I have an audience size of about 22,000 people, how many would I need to survey to get results significant to first 5% and then 1%?
Any thoughts on how I can work this out?

Comments

[omentide.livejournal.com]

You can do confidence intervals which aren't quite the same thing...

I have a link to a website that does them for you, but it's at work. Try google.

Cheers for the tip.

[davywavy.livejournal.com]

Google has provided such a thing. Looks like I'm aiming for a minimum of 400+ people.