From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Statistics (Rated Start-class, Mid-importance)
WikiProject icon

This article is within the scope of the WikiProject Statistics, a collaborative effort to improve the coverage of statistics on Wikipedia. If you would like to participate, please visit the project page or join the discussion.

Start-Class article Start  This article has been rated as Start-Class on the quality scale.
 Mid  This article has been rated as Mid-importance on the importance scale.

Some solutions[edit]

Please specify some discrete solution. This will help the reader to check whether some function available in some program may be the function this article is talking about. Tomeasy T C 07:58, 21 July 2009 (UTC)

I don't understand what you mean by discrete solution. --Zvika (talk) 09:20, 21 July 2009 (UTC)
The values for, e.g., Q(0) or Q(1) or even Q(0.5). Tomeasy T C 17:56, 21 July 2009 (UTC)
Ah, that's a good idea. Will do. --Zvika (talk) 04:33, 22 July 2009 (UTC)


There is an improved bound for Q(x), given at [1]:

where each partial sum gives either upper or lower bound, depending on the sign of the last summand. The sum itself is divergent however, so it cannot be used to calculate the integral with arbitrary precision.

Another approximation due to Laplace:

 … stpasha »  19:09, 1 October 2009 (UTC)

Sounds interesting and worthy of inclusion, if you can find a RS for it. --Zvika (talk) 18:19, 3 October 2009 (UTC)
I just noticed that the bounds given in the article correspond to Laplace’s continuous fraction terminated at k=0 and k=1 respectively:
But you're right, a reliable source which attributes second formula to Laplace would be nice to have.  … stpasha »  18:45, 3 October 2009 (UTC)


In the second paragraph of the article, shouldn't the eta be a mu? -- UKoch (talk) 15:11, 24 February 2014 (UTC)

Yes, it should be a mu, and should be , to be consistent with the notation on the Normal Distribution page. I will fix this. David C Bailey (talk) 08:06, 21 November 2014 (UTC)
Thanks! -- UKoch (talk) 17:57, 23 November 2014 (UTC)

External links modified[edit]

Hello fellow Wikipedians,

I have just modified one external link on Q-function. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:

When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{Sourcecheck}}).

You may set the |checked=, on this template, to true or failed to let other editors know you reviewed the change. If you find any errors, please use the tools below to fix them or call an editor by setting |needhelp= to your help request.

  • If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
  • If you found an error with any archives or the URLs themselves, you can fix them with this tool.

If you are unable to use these tools, you may set |needhelp=<your help request> on this template to request help from an experienced user. Please include details about your problem, to help other editors.

Cheers.—InternetArchiveBot (Report bug) 16:15, 21 July 2016 (UTC)