Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
1.96*Sqrt[.78(1-.78)/n]=.0003
1.96*Sqrt[.78(1-.78)/n]=.0003
Natural Language
Math Input
Extended Keyboard
