jackknife

NO.PZ2021062201000015

问题如下：

Compared with bootstrap resampling, jackknife resampling:

选项：

is done with replacement.

usually requires that the number of repetitions is equal to the sample size.

produces dissimilar results for every run because resamples are randomly drawn.

解释：

B is correct. For a sample of size n, jackknife resampling usually requires n repetitions. In contrast, with bootstrap resampling, we are left to determine how many repetitions are appropriate.

对于大小为 n 的样本，Jackknife resampling通常需要 n 次重复。相比之下，对于boostrap resampling，我们需要确定合适的重复次数。

jackknife不是每次都要换样本的麻，能否给一下两个抽样方法的比较，加深一下记忆

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1 个答案

星星_品职助教 · 2022年04月14日

同学你好，

最主要的区别就是本题考察的：对于大小为 n 的样本，Jackknife resampling通常需要 n 次重复。但对于bootstrap的方法，不一定要重复多少次。

其余对比可见讲义截图。

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NO.PZ2021062201000015 问题如下 Comparewith bootstrresampling, jackknife resampling: A.is ne with replacement. B.usually requires ththe number of repetitions is equto the sample size. C.proces ssimilresults for every run because resamples are ranmly awn. B is correct. For a sample of size n, jackknife resampling usually requires n repetitions. In contrast, with bootstrresampling, we are left to termine how many repetitions are appropriate.对于大小为 n 的样本，Jackknife resampling通常需要 n 次重复。相比之下，对于boostrresampling，我们需要确定合适的重复次数。 RT

2022-10-03 21:16 1 · 回答

jackknife

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