Pratique des Biostatistiques
Accueil › Statistiques descriptives › Statistiques descriptives à une dimension
 Dernière modification: 11 août 2011

Décrire un ensemble de données

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  • strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
  • strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
  • strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
  • strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.
  • strict warning: Non-static method view::load() should not be called statically in /home/iamin/www/umdb/biostats/sites/default/modules/views/views.module on line 906.

Supposons que l'on prélève dans les filets de ce chalutier 15 morues atlantiques. Celles-ci constituent l'échantillon.

Chaque individu est pesé (= mesure xi de la variable poids "X") et les résultats sont répertoriés ci-dessous.

Description d'un ensemble de données où une seule variable est mesurée = statistique DESCRIPTIVE à 1 dimension

Variable étudiée: poids en kg = 1 DIMENSION (X)
Une donnée = 1 mesure de poids (xi)

Individu 1 Poids 1  
 
 
 
 		 Individu 6 Poids 6  
 
 
 
 		 Individu 11 Poids 11
Individu 2 Poids 2 Individu 7 Poids 7 Individu 12 Poids 12
Individu 3 Poids 3 Individu 8 Poids 8 Individu 13 Poids 13
Individu 4 Poids 4 Individu 9 Poids 9 Individu 14 Poids 14
Individu 5 Poids 5 Individu 10 Poids 10 Individu 15 Poids 15

 

Statistique descriptive:

La description de l'ensemble des données se poursuit par le classement des données, les mesures de la tendance centrale et de la dispersion.