# Talk:Noncentral t-distribution

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I can't figure out why the $\mu$ is rendering as Roman, rather than italic in this article. Compare to, say, Variance, but there it renders as PNG rather than HTML. And I don't think logging in with special preferences is a solution. — DIV (128.250.204.118 06:04, 18 March 2007 (UTC))

I agree that an italic mu would look better. I wish I knew how to make that appear. Steve8675309 00:29, 20 March 2007 (UTC)
This can be solved by placing \,\! at the end of each formula, as specified at MetaWikiPedia:Help:Formula#Forced_PNG_rendering. --128.250.5.248 (talk) 04:56, 12 August 2009 (UTC)

I think this description of the noncentral t-distribution is incomplete and overly confusing. A scale parameter is generally included and the density can be written much more succinctly. Jurgen (talk) 20:06, 4 May 2010 (UTC)

I am puzzled by the representation of the first form of the CDF. It specifies that when (x < 0) the recursive part of the function---~F()---operates on the reversed sign of x: but ~F() is utterly insensitive to the sign of x, since x only appears in squared terms (i.e. in y). So why bother to assert that the sign of x changes? mu changes sign, yes, but not x. Lexy-lou (talk) 16:14, 20 April 2014 (UTC)

In Section 1.2.1 Differential equation, the sign of the first derivative of the PDF at zero seems wrong. It says that the first derivative has the opposite sign of the non-centrality parameter ($\mu$), and from the plots of the PDF in the same article, and from general knowledge, when the non-centrality parameter is positive the PDF is increasing at zero. — Preceding unsigned comment added by Niausnil (talkcontribs) 13:35, 29 January 2015 (UTC)