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Séance de cours

Décrire les données: statistiques et tests d'hypothèse

Dans cours

CS-401: Applied data analysis

This course teaches the basic techniques, methodologies, and practical skills required to draw meaningful insights from a variety of data, with the help of the most acclaimed software tools in the data science world (pandas, scikit-learn, Spark, etc.) ...

Description

Cette séance de cours couvre les statistiques descriptives, la quantification de l'incertitude et les tests d'hypothèses. Les sujets incluent la moyenne, la variance, la distribution normale, les statistiques robustes, les distributions à queue lourde et diverses distributions de probabilité. Il traite également des tests d'hypothèses, des intervalles de confiance, du coefficient de corrélation de Pearson et du paradoxe de Simpson.

Enseignant·e·s (2)

Maria Brbic

Maria Brbic is an assistant professor in computer science at EPFL. Prior to joining EPFL, Maria was a postdoctoral researcher in Computer Science at Stanford University working with Jure Leskovec. She received her PhD degree from University of Zagreb in 2019, while also researching at Stanford University and University of Tokyo. Her research was awarded with the Fulbright Scholarship, L’Oreal UNESCO for Women in Science Scholarship, Branimir Jernej award for outstanding publication in biology and biomedicine, and Josip Loncar Silver Plaque award for the best doctoral dissertation. She has been named a Rising Star in EECS by MIT in 2021. Her research is focused on developing new machine learning methods and applying her methods to advance biomedical research.

Robert West

Robert West is a tenure-track assistant professor of computer science at EPFL, where he heads the Data Science Lab. In his research, he develops and applies techniques in machine learning, computational social science, natural language processing, social network analysis, and data mining. Bob also collaborates closely with the Wikimedia Foundation, in his role as a Wikimedia Research Fellow. Bob’s work has won several awards, including best/outstanding paper awards at ICWSM’21, ICWSM’19, and WWW’13, a best-paper runner-up award at WWW’16, a Google Faculty Research Award, a Facebook Research Award, a Hewlett-Packard Graduate Fellowship, and a Facebook Graduate Fellowship. He is actively involved in the research community, e.g., as an Associate Editor of ICWSM and EPJ Data Science and as a co-founder of the Wiki Workshop (held at WWW and ICWSM) and the Applied Machine Learning Days. Bob received his PhD in Computer Science from Stanford University, his MSc from McGill University, Canada, and his undergraduate degree from Technische Universität München, Germany.[Last updated: 25 Aug 2021]

Source officielle

Proximité ontologique

Statistique

Inférence statistique: Statistique mathématique, Test statistique

Analyse des données: Régression (statistiques)

Concepts associés (32)

Pearson correlation coefficient

In statistics, the Pearson correlation coefficient (PCC) is a correlation coefficient that measures linear correlation between two sets of data. It is the ratio between the covariance of two variables and the product of their standard deviations; thus, it is essentially a normalized measurement of the covariance, such that the result always has a value between −1 and 1. As with covariance itself, the measure can only reflect a linear correlation of variables, and ignores many other types of relationships or correlations.

Corrélation (statistiques)

En probabilités et en statistique, la corrélation entre plusieurs variables aléatoires ou statistiques est une notion de liaison qui contredit leur indépendance. Cette corrélation est très souvent réduite à la corrélation linéaire entre variables quantitatives, c’est-à-dire l’ajustement d’une variable par rapport à l’autre par une relation affine obtenue par régression linéaire. Pour cela, on calcule un coefficient de corrélation linéaire, quotient de leur covariance par le produit de leurs écarts types.

Correlation coefficient

A correlation coefficient is a numerical measure of some type of correlation, meaning a statistical relationship between two variables. The variables may be two columns of a given data set of observations, often called a sample, or two components of a multivariate random variable with a known distribution. Several types of correlation coefficient exist, each with their own definition and own range of usability and characteristics. They all assume values in the range from −1 to +1, where ±1 indicates the strongest possible agreement and 0 the strongest possible disagreement.

Intraclass correlation

In statistics, the intraclass correlation, or the intraclass correlation coefficient (ICC), is a descriptive statistic that can be used when quantitative measurements are made on units that are organized into groups. It describes how strongly units in the same group resemble each other. While it is viewed as a type of correlation, unlike most other correlation measures, it operates on data structured as groups rather than data structured as paired observations.

Corrélation croisée

La corrélation croisée est parfois utilisée en statistique pour désigner la covariance des vecteurs aléatoires X et Y, afin de distinguer ce concept de la « covariance » d'un vecteur aléatoire, laquelle est comprise comme étant la matrice de covariance des coordonnées du vecteur. En traitement du signal, la corrélation croisée (aussi appelée covariance croisée) est la mesure de la similitude entre deux signaux.

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Séances de cours associées (52)

Statistiques: Tests d'hypothèses et intervalles de confiance

Couvre les tests d'hypothèses, les intervalles de confiance, les distributions de données et la signification statistique dans l'analyse des données.

Statistiques descriptives: Essais d'hypothèse

Introduit des statistiques descriptives, des tests d'hypothèses, des valeurs p et des intervalles de confiance, soulignant leur importance dans l'analyse des données.

Variance et covariance : propriétés et exemples

Explore la variance, la covariance et les applications pratiques en statistiques et probabilités.

Probabilités et statistiques

Couvre les concepts fondamentaux des probabilités et des statistiques, y compris la régression linéaire, les statistiques exploratoires et l'analyse des probabilités.

Régression linéaire : estimation et inférence

Explore l'estimation de régression linéaire, les hypothèses de linéarité et les tests statistiques dans le contexte de la comparaison de modèles.

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Concepts associés (32)

Pearson correlation coefficient

Corrélation (statistiques)

Correlation coefficient

Intraclass correlation

Corrélation croisée

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