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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from Scratch
93
"""
이진
검색을
사용해서
역함수를
근사
"""
#
표준정규분포가
아니라면
표준정규분포로
변환
if mu != 0 or sigma != 1:
return mu + sigma * inverse
_
normal
_
cdf(p, tolerance=tolerance)
low
_
z = -10.0 # normal
_
cdf(-10)
은
0
에
근접
hi
_
z = 10.0 # normal
_
cdf(10)
은
1
에
근접
while hi
_
z - low
_
z > tolerance:
mid
_
z = (low
_
z + hi
_
z) / 2 #
중간
값
mid
_
p = normal
_
cdf(mid
_
z) #
중간
값의
누적분포
값을
계산
if mid
_
p < p:
low
_
z = mid
_
z #
중간
값이
너무
작다면
더
큰
값들을
검색
else:
hi
_
z = mid
_
z #
중간
값이
너무
크다면
더
작은
값들을
검색
return mid
_
z
앞의 함수는 원하는 확률 값에 가까워질 때까지 표준정규분포의 구간을 반복적
으로 이등분한다.
6.7
중심극한정리
정규분포가 중요한 이유 중의 하나는 중심극한정리(
central
limit
theorem
) 때문
이다. 중심극한정리란 동일한 분포에 대한 독립적인 확률변수의 평균을 나타내
는 확률변수가 대략적으로 정규분포를 따른다는 정리다.
예를 ...
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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.
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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.