Compute Q-Function for Gaussian Random Variables

  • Context: Graduate 
  • Thread starter Thread starter NotoriousNick
  • Start date Start date
Click For Summary
SUMMARY

The discussion focuses on computing the Q-function for Gaussian random variables, specifically the probability that a Gaussian random variable with zero mean and a specified variance exceeds a certain value. Participants suggest using the error function and reference normal distribution tables as effective methods for this calculation. Online resources, such as the normal distribution table at math.unb.ca and the automatic calculator at davidmlane.com, are recommended for quick access to Q-function values.

PREREQUISITES
  • Understanding of Gaussian random variables
  • Familiarity with the error function
  • Knowledge of normal distribution tables
  • Basic statistical concepts
NEXT STEPS
  • Explore the properties of the error function in depth
  • Learn how to use statistical software for computing Q-function values
  • Investigate the implications of variance in Gaussian distributions
  • Study the applications of the Q-function in statistical analysis
USEFUL FOR

Statisticians, data analysts, and anyone involved in probability theory or statistical modeling who needs to compute probabilities related to Gaussian distributions.

NotoriousNick
Messages
29
Reaction score
0
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?!
 
Physics news on Phys.org
Maybe if i mention error function someone will recognize?
 
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
 
Last edited by a moderator:

Similar threads

  • · Replies 1 ·
Replies
1
Views
510
  • · Replies 30 ·
2
Replies
30
Views
5K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K