Stat Q2 Flashcards

1
Q

Permutation simple

A

n!

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2
Q

Permutation à répétition

A

n!/

n1! . n2!. … . ni!

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3
Q

Arrangement simple

A

n!/

(n-p)!

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4
Q

Arrangement à répétition

A

n^p

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5
Q

Combinaison simple

A

n!/

(n-p)! . p!

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6
Q

Combinaison à répétition

A

p
C
n+p-1

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7
Q

Écart type

A

Racine carrée de la variance

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8
Q

Variance

A

1/n . E ni xi^2 - moyx^2

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9
Q

Covariance

A

1/n . E ni xi yi - moyx moyy

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10
Q

Mediale

A

mle - x y - x
_________ = _________
50 - Qi-1 Qi - Qi-1

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11
Q

Mediane

A

mde - x y - x
_________ = _________
50 - Fi-1 Fi - Fi-1

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12
Q

Q1

A

Q1 - x y - x
_________ = _________
25 - Fi-1 Fi - Fi-1

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13
Q

Q3

A

Q3 - x y - x
_________ = _________
75 - Fi-1 Fi - Fi-1

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14
Q

Écart absolu moyen

A

1/n . E ni |xi - moyx|

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15
Q

Moyenne quadratique

A

Racine carrée de 1/n . E ni xi^2

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16
Q

Moyenne arithmétique

A

1/n . E ni xi

17
Q

Moyenne géométrique

A

Racine nième de

x1^n1 . x2^n2 . … . xp^np

18
Q

Intervalle de variation

A

xmax - xmin

19
Q

Coefficient de variation

A

écart type/

moyx

20
Q

Moyenne harmonique

A

n/

E (ni/xi)

21
Q

Coefficient de corrélation

A

cov/

écart type x . écart type y

22
Q

Coefficient de détermination

A

cov^2/

écart type x^2 . écart type y^2

23
Q

Boîte à moustache

A

1,5 . (Q3-Q1)

24
Q

Droite de Mayer

A

m = moyy2 - moyy1 /
moyx2 - moyx1

y - moyy1 = m . (x - moyx1)

25
Q

Droite des moindres carrés

A

y = ax + b
avec a = cov / varx
b = moyy - a . moyx

26
Q

Ajustement exponentiel

A

y = A a^x

log y = log A + x . log a

27
Q

Ajustement puissance

A

y = C x^a

log y = log C + a . log x

28
Q

Valeurs relatives

A

qi = ni xi/

E ni xi