false negative
B1CEFR level
40/100Rarity: uncommon
TechnicalRegister
A result that wrongly indicates no effect or condition when one is actually present.
An underpowered test risks a false negative, making us discard a feature that genuinely works.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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