Definitions from Wiktionary (jackknife)

▸ noun:  (statistics) A resampling method that applies estimators to all subsamples that each omit a single different group (possibly of a single datapoint) of the original sample to provide a sample distribution of the estimate.
▸ noun:  Alternative spelling of jack-knife [A compact folding knife.]
▸ verb:  Alternative form of jack-knife [To fold in the middle, as a jackknife does.]
▸ Also see jackknife


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