Equation 1 · Part 3 · One Tree: The Statistics of Common Descent
Symbol D
What this part means
under one model than the other - not a correlation coefficient, not a subjective sense of resemblance, but a single number with a precise probabilistic meaning that can in principle come out favouring either model.
Its job in the formula
D is an input to the expression that computes the quantity on the left.
Full expression→Symbol D→Article meaning
Where the article explains it
and K , the Bayes factor, states exactly how many times more probable the observed data D are under one model than the other - not a correlation coefficient, not a subjective sense of resemblance, but a single number with a precise probabilistic meaning that can in principle come out favouring either model.
The passage around this formula
…ratio. For sequence data compared under a universal-common-ancestry model against an independent-origins model, . and K , the Bayes factor, states exactly how many times more probable the observed data D are under one model than the other - not a correlation coefficient, not a subjective sense of resemblance, but a single number with a precise probabilistic meaning that can in principle come out favouring either model. For the proteins Theobald examined, it was not close. Universal common…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
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Sources cited in the surrounding passage
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