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Comandos de cálculos estadísticos con una sola
variable (1-VAR)
Los siguientes son los comandos que aparecen sobre los menús
secundarios que aparecen cuando selecciona 4(Sum), 5(Var),
6(MinMax) o 7(Distr) sobre el menú STAT mientras se selecciona
un tipo de cálculo estadístico con una sola variable.
Para informarse acerca de la fórmula de cálculo usada para cada
comando, vea Apéndice <#052>.
Menú secundario Sum (11(STAT)4(Sum))
Seleccione
Cuando desea obtener esto:
este ítem:
1Σx
2
Suma de los cuadrados de los datos de muestra.
2Σx Suma de los datos de muestra.
Menú secundario Var (11(STAT)5(Var))
Seleccione
Cuando desea obtener esto:
este ítem:
1n Número de muestras.
2o Media de los datos de muestra.
3xσn Desviación estándar de población.
4xσn–1 Desviación estándar de muestra.
Menú secundario MinMax (11(STAT)6(MinMax))
Seleccione
Cuando desea obtener esto:
este ítem:
1minX Valor mínimo.
2maxX Valor máximo.
Menú secundario Distr (11(STAT)7(Distr))
1 P( 2 Q( 3 R( 4't
Este menú puede usarse para calcular la probabilidad de la
distribución normal estándar. La variable aleatoria normalizada t se
calcula con la expresión mostrada a continuación, usando el valor
medio (o) y valor de desviación estándar de población (xσn),
obtenido desde el ingreso de datos sobre la pantalla del editor STAT.
Distribución normal estándar
P
(
t
)Q
(
t
)R
(
t
)
0
t
0
t
0
t
51


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