June 2024
Beginner to intermediate
352 pages
9h 29m
Korean
Content preview from 개발자를 위한 필수 수학
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60
개발자를 위한 필수 수학
2.1
확률 이해하기
확률
probability
은 어떤 사건
event
이 일어날 것이라고 믿는 정도를 말하며, 종종 백분율로 확률을 표
현합니다. 다음은 확률로 답변해야 할 질문입니다.
•
동전을
10
번 던져서 앞면이
7
번 나올 확률은 얼마인가요?
•
선거에서 승리할 가능성은 얼마인가요?
•
비행기 스케줄이 지연될 확률은 얼마인가요?
•
제품에 결함이 있다고 얼마나 확신하나요?
확률을 표현하는 가장 일반적인 방법은 백분율입니다. 예를 들어 ‘제가 타야 할 항공편이 연착
될 확률은
70
%입니다’와 같습니다. 확률을
P
(
X
)라고 하며, 여기서
X
는 관심 대상인 사건입니
다. 확률로 작업할 때는 주로
0
.
0
에서
1
.
0
사이의 소수로 값을 표시합니다. 따라서 이 경우에
는 확률이
0
.
70
이죠.
가능도
likelihood
는 확률과 비슷하기에 두 단어를 혼동하기 쉽습니다 (많은 사전에서도 이를 혼동
하곤 합니다 ). 일상적인 대화에서 ‘확률’과 ‘가능도’를 같은 의미로 사용해도 무방하지만, 차이
점을 정확히 알고 있어야 합니다. 확률은 아직 일어나지 않은 사건에 대한 예측을 정량화하는
것이고, 가능도는 이미 발생한 사건의 빈도를 측정하는 것입니다. 통계와 머신러닝에서는 확률
(미래)을 예측하기 위해 데이터 형태에 대한 가능도 (과거)를 사용합니다.
사건이 ...
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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.