Talk:Folded normal distribution

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Should the $\sigma ^{2}$ be inside of the variance equation? I think not. Check this.

Isn't this distribution exactly the same as a noncentral chi distribution with 1 degree of freedom? --Zvika 11:05, 17 July 2007 (UTC)[reply]

If Y ~ FoldedNormal(μ, σ²), then (Y/σ) ~ NoncentralChi(df=1, noncentrality=μ/σ). So pedantically speaking, your statement is only correct for σ=1. Btyner (talk) 19:41, 16 December 2007 (UTC)[reply]

what is Phi capital

Obviously, Phi is not explained. Every variable or function should be explained! Please, check and correct. — Preceding unsigned comment added by 87.95.58.3 (talk) 19:32, 7 March 2016 (UTC)[reply]

I added the definition of Phi, the normal cumulative distribution function, and a link to that page. Hawryluka (talk) 20:46, 14 March 2016 (UTC)[reply]