
5 SERIES STATISTIQUES A DEUX VARIABLES 18 '
Authored by g COMPAGMATHS
Mathematics
11th Grade
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20 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Déterminer, à l'aide de la calculatrice, l'équation de la droite d'ajustement par la méthode des moindres carrés :
y = 3,51x - 12,2
y = 4,51x + 12,2
y = - 4,51x +2,2
y = 4,51x + 22,2
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A l'aide du tableau, déterminer les coordonnées du point moyen G.
G ( 3,5; 27,33 )
G ( 3 ; 28 )
G ( 3,5; 28 )
G ( 28; 3,5 )
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
On attribue x = 1 pour le mois de Février.
Quelle est la valeur de x pour le mois de Novembre?
x=9
x=10
x=11
x=12
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Comment appelle -t-on ce type représentation graphique ?
nuage de points
diagramme circulaire
diagramme en bâton
histogramme
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Est-il judicieux de procéder à un ajustement affine de cette série statistique?
Oui
Non
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
L'équation de la droite d'ajustement est : y = 0,14x + 82
En déduire l'espérance de vie d'une française née en 2008
83,96 ans
83,68 ans
83,12 ans
83,82 ans
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Le coefficient directeur de la droite d'ajustement est environ :
1,2
0,65
-0,8
123,8
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