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The Impact of Application of the Jackknife to the Sample Median
The American Statistician  (IF8.71),  Pub Date : 2021-02-04, DOI: 10.1080/00031305.2020.1869090
Jianning Yang, John E. Kolassa


The jackknife is a reliable tool for reducing the bias of a wide range of estimators. This note demonstrates that even such versatile tools have regularity conditions that can be violated even in relatively simple cases, and that caution needs to be exercised in their use. In particular, we show that the jackknife does not provide the expected reliability for bias-reduction for the sample median, because of subtle changes in behavior of the sample median as one moves between even and odd sample sizes. These considerations arose out of class discussions in a MS-level nonparametrics course.