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Equation 1 · Part 7 · The 37-Culture Study and What Replication Did to Mate-Choice Science

addition

D≈d12+d22+⋯+dk2D \approx \sqrt{d_1^2 + d_2^2 + \cdots + d_k^2}
addition

What this part means

Add the term after the plus sign to the term or group before it.

Its job in the formula

Add the term after the plus sign to the term or group before it.

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

Addition combines quantities; subtraction measures the signed difference between them. Parentheses show what is combined before the rest of the expression is evaluated.

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Sources cited in the surrounding passage

These citations provide research context; check each source for the exact claim it supports.