May 2022
Beginner to intermediate
448 pages
13h 7m
Korean
book
밑바닥부터 시작하는 데이터 과학 데이터 분석을 위한 파이썬 프로그래밍과 수학·통계 기초
by Joel Grus, Hangyeol Kim, Seongju Ha, Eunjung Park
Content preview from 밑바닥부터 시작하는 데이터 과학 데이터 분석을 위한 파이썬 프로그래밍과 수학·통계 기초
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Data Science
78
num
_
friends
_
good = [x
for i, x in enumerate(num
_
friends)
if i != outlier]
daily
_
minutes
_
good = [x
for i, x in enumerate(daily
_
minutes)
if i != outlier]
daily
_
hours
_
good = [dm / 60 for dm in daily
_
minutes
_
good]
assert 0.57 < correlation(num
_
friends
_
good, daily
_
minutes
_
good) < 0.58
assert 0.57 < correlation(num
_
friends
_
good, daily
_
hours
_
good) < 0.58
이상치를 제거하니 더 강력한 상관관계를 볼 수 있다(그림
5
-
3
).
그림 5-3
이상치 데이터는 알고 보니 회사에서 테스트용으로 생성했다가 제거하는 것을
잊은 내부 테스트용 계정이었다. 상관관계에서 이상치 사용자를 포함하지 않는
것이 타당하다고 확인되는 순간이었다.
5.3
심슨의 역설
데이터 분석을 하다 보면 혼재변수(
confounding
variables
)가 누락되어 상관관
계가 잘못 계산되는
심슨의 역설(
Simpson
’
s
paradox
)에 흔히 직면하게 된다.
예를 들어 모든 사용자를 ...
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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.