stats Flashcards

1
Q

nature de variable

A

quantitative continue : aussi précis qu’on veut
discrète : entier

qualitative ordinale : puet être mis en ordre
nominale : le sexe ne peut être mis en ordre

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2
Q

diagramme circulaire pk

A
  • de 8 modalités
    qualitative nominal
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3
Q

bande verticale

A

échelle ordinal

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4
Q

diagramme linéaire

A

comparer des trucs entre eux

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5
Q

bâtons

A

10 et moins
quantitative discrète

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6
Q

histogramme

A

avec echelle

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7
Q

ogive

A

comparer 2 classe

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8
Q

boite a moustache

A

valeurs aberrante

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9
Q

trouver les valeurs aberrantes

A

Q1-1.5(Q3-Q1)
Q1+1.5(Q3-Q1)

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10
Q

Interpretation moyenne

A

le nombre moyen de pipi est de

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11
Q

médiane

A

total / 2 50% des unités statistique on varaible et moins
aller chercher le pourcentage cumulé de 50%
1mm/pourcentage de la classe = x mm/50% - le pourcentage cumulé de l’autre avant
= xmm + la classe modale

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12
Q

écart type

A

racine carrée (vartiable- la moyenne)au carré * unité statistique / total -1

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13
Q
A
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14
Q

coéficien de variation

A

cv= écart type/moyenne *100
distribution hétérogène plus grande que 15%
distribution homogène plus petit que 15%

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