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uu
uu
u Test
Z à 2 échantillons
Ce test est utilisé pour vérifier l’hypothèse lorsque les écarts-types de deux populations sont
connus. Le Test Z à 2 échantillons s’applique à la répartition normale.
Z =
o
1
o
2
σ
n
1
1
2
σ
n
2
2
2
+
o1 : moyenne de l’échantillon 1
o2 : moyenne de l’échantillon 2
σ
1 : écart-type de la population dont est issu
l’échantillon 1
σ
2 : écart-type de la population dont est issu
l’échantillon 2
n1 : taille de l’échantillon 1
n2 : taille de l’échantillon 2
Utilisez les touches suivantes à partir de la liste de données statistiques.
3(TEST)
1(Z)
2(2-S)
La signification de chaque option en cas de spécification de données de listes est la suivante.
Data ............................ type de données
µ
1 ................................. conditions du test de la valeur moyenne d’une population
G
µ
2 » spécifie un test bilatéral, « <
µ
2 » spécifie un test
unilatéral à droite, « >
µ
2 » spécifie un test unilatéral à
gauche.)
σ
1 ................................. écart-type de la population de l’échantillon 1 (
σ
1 > 0)
σ
2 ................................. écart-type de la population de l’échantillon 2 (
σ
2 > 0)
List(1) .......................... liste dont le contenu doit être utilisé comme données
d’échantillon 1 (Liste 1 à 26)
List(2) .......................... liste dont le contenu doit être utilisé comme données
d’échantillon 2 (Liste 1 à 26)
Freq(1) ........................ effectif de l’échantillon 1 (Aucune ou Liste 1 à 26)
Freq(2) ........................ effectif de l’échantillon 2 (Aucune ou Liste 1 à 26)
Save Res ..................... liste pour la sauvegarde des résultats des calculs
(Aucune ou Liste 1 à 26)
Execute ....................... exécution d’un calcul et tracé d’un graphe
6-5-5
Tests
314


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