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Stat 5601 (Geyer) Examples (Better Bootstrap)


General Instructions

To do each example, just click the "Submit" button. You do not have to type in any R instructions or specify a dataset. That's already done for you.

BCa Intervals

Section 14.3 in Efron and Tibshirani.

BCa stands for bias corrected and accelerated. It is an example of really horrible alphabet soup terminology. Really trendy, though. Used to be that scientists used terminology that involved real English (or Latin) words. Nowadays, it is trendy to just use letters. It's molecular biology envy (a la DNA, RNA, G6PD, and so forth). If you can actually express yourself and be understood, then you must not be a real scientist, because as everyone knows science is hard to understand. Hence the modern trend for scientists to speak and write as illiterately as possible.

To parody this trend, we call these alphabet soup, type 1 intervals (for type 2 see below).


ABC Intervals

These are the alphabet soup, type 2 intervals.

ABC stands for approximate bootstrap confidence, whatever that means. It doesn't actually bootstrap, but just approximates the bootstrap. Chapter 22 of Efron and Tibshirani explains, but we won't get into that.

Section 14.4 in Efron and Tibshirani.