May 2021
Beginner to intermediate
380 pages
9h 22m
Korean
Content preview from 데이터 과학을 위한 통계(2판)
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125
3
장
통계적 실험과 유의성검정
그림
3-4
페이지
A
와 페이지
B
사이의 세션 시간 차이에 대한 도수분포. 여기서 수직선(점선)은 관측된 차이를 보여
준다.
3.3.3
전체 및 부트스트랩 순열검정
앞서 살펴본 랜덤 셔플링 절차를
임의순열검정
random
permutation
test
또는
임의화검정
randomization
test
이
라고 부르며, 이외에도 순열검정에는 두 가지 변종이 있다.
•
전체순열검정
exhaustive
permutation
test
•
부트스트랩 순열검정
bootstrap
permutation
test
전체순열검정에서는 데이터를 무작위로 섞고 나누는 대신 실제로 나눌 수 있는 모든 가능한 조
합을 찾는다. 이것은 샘플 크기가 비교적 작을 때만 실용적이다. 셔플링을 많이 반복할수록, 임
의순열검정 결과는 전체순열검정의 결과와 거의 유사하게 근접한다. 전체순열검정은 영모형이
어떤 유의수준 이상으로 더 ‘유의미하다’라는 식의 다소 애매한 결론(
3
.
4
절 참고)이 아닌 좀 더
정확한 결론을 보장하는 통계적 속성 때문에
정확검정
exact
test
이라고도 한다.
부트스트랩 순열검정에서는 무작위 순열검정의
2
단계와
3
단계에서 비복원으로 하던 것을
복원
추출
로 수행한다. 이런 식으로 재표본추출 과정에서 모집단에서 개체를 선택할 때 임의성을 보
장할 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.