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Cálculos estadísticos
k Desviación estándar (Modo SD)
•Presione F F 1 (fx-85W) para entrar en el modo SD
para cálculos estadísticos usando la desviación estándar.
Para los otros modelos, presione
F 2
.
Los datos ingresados siempre comienzan con
A m
= para borrar la memoria de estadísticas.
Los datos ingresados se usan para
calcular los valores para
n, Σx, Σx
2
, o,
σn y σn-1 que pude recuperar usando las
operaciones de teclas dadas.
Ejemplo : Para calcular
σnҀ1, σn, o, n,
Σx, y Σx
2
para los datos siguientes : 55,
54, 51, 55, 53, 53, 54, 52
Ingrese el modo SD
A m = (Borrado de memoria)
55
S 54 S 51 S 55 S
53 S S 54 S 52 S
(
Desviación estándar de muestra
σnҀ1)A N =
(
Desviación estándar de población
σn) A A =
(Media aritmética o) A M =
(Número de datos n) 0 k
(Suma de valores Σx) 0 H
(Suma de cuadrados de valores Σx
2
) 0 G
Precauciones para el ingreso de datos
S S introduce los mismos datos dos veces.
•También puedo ingresar múltiples ingresos del mismo
dato usando
A G. Para ingresar los datos “110” diez
veces, por ejemplo, presione 110
A G 10 S.
0 1 Σx
2
0 2 Σx
0 k n
A M o
A A σn
A N σn-1
1.407885953
00
1.316956719
00
53.375
00
8.
00
22805.
00
427.
00
52.
00
SD
fx-85W: F F 1
Otros modelos: q 2
21


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