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Studies & Courses/Data Analytics & Stats9

[Probability] Discrete, Continuous, Joint Probability Distributions - Examples Example 3.8 A shipment of 20 similar laptop computers to a retail outlet contains 3 that are defective. If a school makes a random purchase of 2 of these computers, find the probability distribution for the number of defectives. Solution : 더보기 Example 3.11 Suppose that the error in the reaction temperature, in °C, for a controlled laboratory experiment is a continuous random variable X having th.. 2020. 5. 31.
[Data Visualization] Challenges and Data Visualization 데이터 시각화와 가치 발견의 도전 마이애미-데이드 카운티 공립학교 데이터 (성취도 점수) (출처 : The Truthful Art: Data, Charts, and Maps for Communication, Alberto Cairo, 2016) What Went Wrong (출처 : The Truthful Art: Data, Charts, and Maps for Communication, Alberto Cairo, 2016) The Hockey Stick Chart (출처 : The Truthful Art: Data, Charts, and Maps for Communication, Alberto Cairo, 2016) 데이터 시각화와 가치 표현의 혁신 신경과학이 10년 간 독립적인 학문으로 형성된 과정 .. 2020. 5. 24.
[Data Visualization] Intro to Data Visualization 데이터 시각화와 HCI/UX 데이터 시각화 과정의 2가지 원칙 - 보는 사람이 인지적인 부담이 없고, 쉽고 명확하게 시각화 결과물을 이해할 수 있어야 한다. - 사실의 왜곡이 없어야 한다. HCI/UX란? - HCI : 인간과 컴퓨터 상호 작용(Human-computer interaction)은 인간(사용자)과 컴퓨터 간의 상호작용에 대해 연구하는 학문 분야 (출처 : 위키디피아) - UX : 사용자 경험은 사용자가 어떤 시스템, 제품, 서비스를 직, 간접적으로 이용하면서 느끼고 생각하게 되는 총체적 경험 (출처 : 위키디피아) 칼라 스케일(Color Scales) 전략 - 정성적 (Qualitative Color Scales) - 순차적 (Sequential Color Scales) - 발산형 (Div.. 2020. 5. 24.
[Probability & Statistics] 4. Bayes’ Rule, Concept of a Random Variable Probability & Statistics Bayes’ Rule, Concept of a Random Variable Chapter 2. Probability Section 2.7 Bayes’ Rule Figure 2.12 Venn diagram for the events A, E and E ' Theorem 2.13 : Rule of Total Probability ★ If events B1,B2, . . . ,Bk constitute a partition of the sample space S and P(Bi) 6= 0 for i = 1, 2, . . . , k, then for any event A in S: Figure 2.14 Partitioning the sample space S Examp.. 2020. 4. 18.
[Probability & Statistics] 2. Sample Space, Events, Counting Sample Points Probability & Statistics Chapter 2. Probability Section 2.1 Sample Space Definition 2.1 Sample Space : the set of all possible outcome of a statistical experiment Figure 2.1 Tree diagram for Example 2.2 Section 2.2 Events Definition 2.2 Event : a subset of a sample space Definition 2.3 Comlement : an event A with respect to S is the subset of all elements of S that are not in A Definition 2.4 In.. 2020. 4. 18.
[Probability] Intro to Statistics and Data Analysis Probability Intro to Statistics and Data Analysis Why study probability/statistics? • many fields of science and industry uses probabilistic/statistical methods : manufacturing, finance, medicine, computer engineering, insurance, physics... • scientific experiments and observations Fundamental relationship between probability and statistics 2020. 4. 18.
[Probability] Probability - Part 2 Probability Probability - Part 2 Section 2.4 : Probability of an Event Definitions 2.9 Probability : an event A is the sum of the weights of all sample points in A. If A1, A2, A3... is a sequence of multually exclusive events, then Exampe 2.24 A coin is tossed twice. What is the probability that at least 1 head occurs? S = {HH, HT, TH, TT} E = {HH, HT, TH} A ={TT} 1-(1/4)=3/4 Rule 2.3 Exampe 2.2.. 2020. 4. 5.
[Probability] Probability - Part 1 Probability Probability - Part 1 Definitions Sample Space : the set of all possible outcome of a statistical experiment Event : a subset of a sample space Comlement : an event A with respect to S is the subset of all elements of S that are not in A Intersection : the event contating all elements that are common to A and B Pemutation : an arrangement of all or part of a set of objects. Theorem Th.. 2020. 4. 1.
[Probability] 1. Probability - Problems Probability Probability Problems Concepts Probability: a numerical description of how likely an eventis to occur or how likely it is that a proposition is true. (Wikipedia) Combination: A combination is a selection of objects where order is not important. Permutation: A permutation is an arrangement of objects in a definite order. Problems 1. In how many different ways can a true-false test cons.. 2020. 3. 27.

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