August 2022
Beginner to intermediate
436 pages
9h 43m
Korean
Content preview from SQL로 시작하는 데이터 분석
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355
7
장
실험 분석
석 관점에서 실험은 크게 두 가지 유형으로 나뉘며, 결과가 이진형인 실험 (카이제곱 검정 사
용)과 연속형인 실험(
t
-검정 사용 )이 있습니다.
7.3.1
카이제곱 검정
결과가 이진형인 실험은 특정 액션의 발생 여부만 확인합니다. 사용자가 등록을 완료하는지 완
료하지 않는지, 고객이 웹사이트 광고를 클릭하는지 클릭하지 않는지, 학생이 졸업하는지 졸업
하지 않는지 등이 이에 해당합니다. 이런 실험에서는 각 사용자군에서 해당 액션이 발생한 비
율을 계산합니다. 분모는 전체 액션 수이고, 분자는 완료된 액션 수입니다. 이렇게 계산한 지표
는 완료율, 클릭률, 졸업률 등의 비율이 됩니다.
카이제곱 검정
Chi
-
Squared
Test
은 카테고리 타입 변수에 대한 통계 검정 방법으로, 각 사용자군에서
특정 행동의 발생 비율에 유의미한 차이가 있는지 확인합니다.
6
카이제곱 검정을 수행하기 위
한 데이터는
분할표
contingency
table
형태로 정리해 두 가지 속성의 지점별로 관측 빈도를 확인하
기 쉽도록 합니다. 이러한 피벗에 익숙하다면 분할표가 마치 피벗 테이블처럼 보일 겁니다.
이제 모바일 게임 데이터셋을 활용해 카이제곱 검정 방법을 살펴봅시다. 프로덕트 매니저가 신
규 플레이어에게 게임 방법을 안내하고자 여러 화면으로 구성된 온보딩 기능을 새로 출시했다 ...
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and much more.
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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.