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.
int_(-inf)^z exp(-x^2/2)/sqrt(2pi) = 0.05
int_(-inf)^z exp(-x^2/2)/sqrt(2pi) = 0.05
Natural Language
Math Input
Extended Keyboard
