August 2022
Beginner to intermediate
436 pages
9h 43m
Korean
Content preview from SQL로 시작하는 데이터 분석
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223
4
장
코호트 분석
4.5
코호트를 활용한 크로스 섹션 분석
앞 절에서 살펴본 코호트 분석 기법들은 코호트 자체의 변화는 알아차리기 쉬운 반면, 전체 사
용자 구성의 변화를 알아차리기는 힘들다는 한계가 있습니다.
혼합 이동
mix
shift
이란 시간에 따른 사용자 구성의 변화를 의미합니다. 혼합 이동으로 인해 시간
이 지나면 코호트의 구성이 처음과 달라지게 되며, 이는 사용자층의 국제화, 순수 고객 유치 전
략과 광고를 통한 고객 유치 전략의 전환, 틈새시장에서 대규모 시장으로의 진입 등에 의해 발
생합니다. 혼합 이동이 어디서 일어나는지 파악하기 위해 새로운 코호트나 세그먼트를 추가해
확인하기도 합니다.
코호트 분석과 대조적으로,
크로스 섹션 분석
cross
-
sectional
analysis
은 특정 시점을 기준으로 개인 또
는 그룹 간 차이를 비교합니다. 예를 들어, 소득과 교육 수준의 상관관계를 밝히는 데 활용됩니
다. 크로스 섹션 분석은 시계열 데이터를 모두 수집할 필요 없이 특정 시점의 데이터만 수집하
면 된다는 장점이 있습니다. 크로스 섹션 분석은 의미 있는 결과를 찾고 새로운 가설을 도출하
는 데 도움이 되지만 적절하지 않은 시기를 선택해 분석하면
생존자 편향
survivorship
bias
등으로 인
해 잘못된 분석 결과가 나오기도 합니다.
생존자 편향
“우리의 ...
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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.