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kk
kk
k Test
χ
2
Le Test
χ
2
crée un certain nombre de groupes indépendants et vérifie l’hypothèse en
fonction de la proportion de l’échantillon inclus dans chaque groupe. Le Test
χ
2
s’applique
aux variables dichotomiques (variables offrant deux possibilités, comme oui ou non).
Effectifs attendus
F
ij
=
Σ
x
ij
i=1
k
×
Σ
x
ij
j=1
k
ΣΣ
i=1
j=1
x
ij
χ
2
=
ΣΣ
F
ij
i=1
k
(xij Fij)
2
j
=1
Utilisez les touches suivantes à partir de la liste de données statistiques.
3(TEST)
3(CHI)
Spécifiez ensuite la matrice qui contient les données. La signification des options
précédentes est la suivante.
Observed .................... nom de la matrice (A à Z) contenant les effectifs observés
(entiers positifs de toutes les cellules)
Expected ..................... nom de la matrice (A à Z) réservée à la sauvegarde des
effectifs attendus
Save Res .................... liste pour la sauvegarde des résultats des calculs
(Aucune ou Liste 1 à 26)
Execute ....................... exécution d’un calcul ou tracé d’un graphe
6-5-18
Tests
# La matrice doit avoir au moins deux lignes et
deux colonnes. Un erreur se produit si elle
n’a qu’une seule ligne et une seule colonne.
#L’écran de réglage de matrice (A à Z)
s’affiche par une pression de 1(Mat)
lorsque les réglages des paramètres
« Observed » et « Expected » sont surlignés.
# Une pression de 2('MAT) pendant le
réglage des paramètres fait passer à l’éditeur
matrices où le contenu des matrices peut être
changé et vérifié.
327


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