题目
Compared with bootstrap resampling, jackknife resampling:
选项
A.is done with replacement.
B.usually requires that the number of repetitions is equal to the sample size.
C.produces dissimilar results for every run because resamples are randomly drawn.
答案
B
解析
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. B是正确的。对于大小为n的样本，切片法通常需要重复n次。相比之下，使用自助法重抽样，我们需要确定适当的重复次数。