Fórmulas Flashcards

1
Q

Amplitud

A

Xmax – Xmin
———————
n

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2
Q

Media aritmética

A

_ EXini
X = ———
n

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3
Q

Cuartiles: C1

A

n
C1 = —
4

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4
Q

Cuartiles: C2

A

n
C2= —
2

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5
Q

Cuartiles: C3

A

3n
C3 = —
4

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6
Q

Desviación típica

A

____

s = _/ s*2

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7
Q

Varianza

A

Exi2 • ni _
S
2 = ————— - X*2
n

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8
Q

Posición Mediana impar

A

2

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9
Q

Posición Mediana par

A

n
- + 1
2

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10
Q

Percentiles

A

Percentil
-
n

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11
Q

Recorrido

A

Re = max (xi) - min (xi)

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12
Q

Rango intercuartilico

A

RI = C3 - C1

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13
Q

Coeficiente de variación

A

s
cv = ——
|x|

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14
Q

Simetría

A

_
E(xi - x) 3 ni/n
g1 = ————————
s
3

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15
Q

Curtosis

A

_
E(xi - x) 4 ni/n
g2 = ———————— - 3
s
4

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16
Q

Tipificación

A

_
x - x
Z = ———
sx

17
Q

Transformación lineal

A

y = a + bx

18
Q

Covarianza

A

Exi•ni•yi _ _
Sxy = ————— - x • y
n