
CHap7_Statistiques_CST4
Authored by Catherine Falgueyret
Mathematics
10th Grade
Used 3+ times

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5 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Quelle est la médiane de cette distribution représentée par ce diagramme à tige et à feuille.?
58
54,96
55
67
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
À son dernier examen de français, la note de Jérôme était au rang centile 40. Parmi les autres élèves qui ont passé cet examen, 46 ont eu un résultat inférieur à lui et 3 autres ont eu le même résultat.
Combien d’élèves ont passé cet examen ?
83
115
118
120
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Indique le nuage de points qui montre la corrélation linéaire la plus forte entre
les deux variables.
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Des recherches établissent un lien fort entre le temps passé devant un écran et le nombre d'heures de sommeil des adolescents.
Les chercheurs concluent que:
le temps passé devant un écran nuit au sommeil.
Selon ces informations, de quelle valeur el coefficient de corrélation de l'étude pourrait-il s'approcher?
0,85
-0,24
-0,82
0,36
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Détermine l'écart moyen de cette distribution:
9, 11, 13, 18, 18, 25, 27, 28, 31, 35
21,5
18
7,7
10
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