Equation 1 · Part 3 · The 37-Culture Study and What Replication Did to Mate-Choice Science

Symbol d_2^2

D \approx \sqrt{d_1^2 + d_2^2 + \cdots + d_k^2}

d_2^2

What this part means

$d_2^2$ is squared: multiply the underlying quantity by itself. The square is a mathematical operation, not a second independent variable.

Its job in the formula

$d_2^2$ is squared: multiply the underlying quantity by itself. The square is a mathematical operation, not a second independent variable.

Full expressionSymbol d_2^2Article meaning

The passage around this formula

What the multivariate reframing from Daniel Conroy-Beam’s research group adds is a reason the two underlying questions, how big is any one sex gap and how do several gaps combine, can have genuinely different answers. People do not evaluate potential partners one trait at a time; they weigh a whole pattern of traits together, so that a modest deficit on one dimension can be offset by a surplus on another, the way two towns 100 miles apart on each of two separate axes end up not 100 but roughly 141 miles apart along the diagonal between them [ 9 ] . In simplified form, treating the dimensions as uncorrelated and standardized, that compounding looks like an ordinary Euclidean distance across k…

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the surrounding passage

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