Compute Q-Function for Gaussian Random Variables

[NotoriousNick]

How can I compute values for the Q-function:

Probability that a gaussian random variable with zero mean and some variance exceeds a particular value.



Web, Calculator, Pencil?!

 

[NotoriousNick]

Maybe if i mention error function someone will recognize?

 

[HallsofIvy]

Look it up on a table of the Normal distribution comes to mind. But I'm sure there are calculators that will also do that.

A normal distribution table is here:
http://www.math.unb.ca/~knight/utility/NormTble.htm

Here's a site that does that automatically:
http://davidmlane.com/hyperstat/z_table.html