Talk:F-statistics

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I started a page on Fst without realizing that this page about F-statistic existed. I discovered this one and do not know if I should erase my page or not. However, I go in a different direction and it would take a lot of editing to fit what I want to say into this page. Any recommendation about what I should do?

INCORRECT This is not the correct definition of F. It should be

 F = \frac{\operatorname{E}{(f(\mathbf{Aa}))} - \operatorname{O}(f(\mathbf{Aa}))} {\operatorname{E}(f(\mathbf{Aa}))}\!

I haven't checked the entire article, but the mistake may very well be carried through. I'll check and fix it when I get some time. Ted 22:12, 10 March 2006 (UTC)

Mostly done. I haven't checked the section FST. I don't use that definition. Ted 18:52, 11 March 2006 (UTC)

Error correction: Reduction in heterozygosity rather than homozygosity[edit]

I replaced homozygosity with heterozygosity in second part of first sentence:

"more specifically the degree of (usually) a reduction in heterozygosity when compared to Hardy-Weinberg expectation"

Ian.

Aetheogamous (talk) 19:36, 18 June 2008 (UTC)

This formula is not properly stated[edit]

This article said:

A common definition is the following:
 F_{ST} = \frac{\operatorname{var}(p)}{p\,(1 - p)} \!
where the variance of p is computed across sub-populations and p(1 −p) is the expected frequency of heterozygotes.

Obviously that doesn't make sense; it seems the thing in the numerator was supposed to be the bold-face p rather than p. I changed it to this:

A common definition is the following:
 F_{ST} = \frac{\operatorname{var}(\mathbf{p})}{p\,(1 - p)} \!
where the variance of p is computed across sub-populations and p(1 −p) is the expected frequency of heterozygotes.

But it doesn't say what the random variable called (bold-face) p actually is. Anyone not offended by this isn't paying attention. Michael Hardy (talk) 18:01, 11 October 2009 (UTC)

Lay persons[edit]

I have a double A-level in maths, but I have no idea what "obs" means in an equation. Any chance of a lay person's version? As far as I know about genetic statistics, all I know is that if I leave my playstation on overnight, I'm helping people who understand this shit.

obs means "observed", used in population genetics when comparing expected and observed values Jebus989 09:31, 5 May 2011 (UTC)

Incorrect information for the F example used.[edit]

Under the section Definitions and Equations, where an example is given of how to calculate ƒ(AA) for the population, I believe the equation given is actually for ƒ(Aa). I'm not an expert on the topic so I don't dare change it myself but I have marked it as dubious. -biocrite {📠Talk📝Contribs} 13:37, 27 February 2015 (UTC)