June 2024
Beginner to intermediate
352 pages
9h 29m
Korean
Content preview from 개발자를 위한 필수 수학
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104
개발자를 위한 필수 수학
두 그래프 사이의 관계를 살펴봅시다.
S
자형 곡선(시그모이드
sigmoid
곡선이라고 함)인
CDF
는
해당 위치까지
PDF
의 면적을 나타냅니다. [그림
3
-
9
]에서 음의 무한대부터
64
.
43
(평균)까지
의 면적에 해당하는
CDF
값은 정확히
0
.
5
또는
50
%입니다.
그림
3-9
평균까지의 확률을 측정하는 골든 리트리버 몸무게의
PDF
와
CDF
평균까지 면적이
0
.
5
또는
50
%인 이유는 정규 분포의 대칭성 때문입니다. 따라서 이 종 모양
곡선의 다른 쪽의 면적도
50
%라고 예상할 수 있습니다.
사이파이를 사용해
64
.
43
까지의 면적을 계산하려면 [예제
3
-
10
]처럼
norm
.
cdf
()
함수를 사
용합니다.
예제
3-10
파이썬의 정규 분포
CDF
from
scipy.stats
import
norm
mean
=
64.43
std_dev
=
2.99
x
=
norm.cdf(64.43,
mean,
std_dev)
print(x)
# 0.5
2
장에서 했던 것처럼 면적을 빼는 방식으로 중간 범위의 면적을 구할 수 있습니다. 몸무게가
62
~
66
파운드 사이인 골든 리트리버를 관측할 확률을 구하려면 [그림
3
-
10
]처럼
66
까지의 면
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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.