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TRABAJO ESTADISTICA
PRESENTACIÓN Y ANÁLISIS ESTADÍSTICO:
I. En la empresaNiñaValiente,se tomóunamuestrarepresentativade mujerestrabajadorasde
diferentesáreaspara evaluarel gastoque representalaescolaridadde susmenoreshijosenel
mes de marzo, con la finalidad de realizar una campaña escolar que beneficie a dichas
colaboradoras. Los resultados se observan a continuación:
1. (4 puntos) Propón 2 tipos de gráficos con los que representarías dicha información y
sustenta dicha elección.
La elecciónde este gráficoesporque representa exactamentelainformacióndadaenlatabla
de frecuencias(frecuenciaabsolutavsgastos),esdecirhay 7 trabajadoras que tienenungasto
entre S/ 1540 y S/ 3694 con un gasto promedio de S/ 2617 (marca de clase).
Gasto
Marca
de
clase
fi Fi hi% Hi%
[1540-3694[ 2617 7 7 14 14
[3694-5848[ 4771 15 22 30 44
[5848-8002[ 6925 14 36 28 72
[8002-10156[ 9079 4 40 8 80
[10156-12310] 11233 10 50 20 100
Total 50 100
Este tipo de gráfico representalos datos de frecuenciaabsolutavs la marca de clase, esdecir
que hay 15 trabajadoras que tienenungasto promediode S/ 4771.
Este tipo de gráfico representa los datos de frecuencia absoluta acumulada vs limites
inferiores, es decir que hay 36 trabajadoras que tienen un gasto entre S/ 1540 y S/ 8002.
2. (4 puntos) Determinae interpretael porcentajede trabajadoresque gastaunmontodesde
S/5800 pero menora S/ 10 000.
Nos piden el porcentaje de trabajadoras que gastan un monto desde S/ 5800 a S/
10000, es decir: X + 28% + Y
Por interpolación se tiene:
𝟓𝟖𝟒𝟖 − 𝟑𝟔𝟗𝟒
𝟑𝟎%
=
𝟓𝟖𝟒𝟖 − 𝟓𝟖𝟎𝟎
𝑿
De donde se tiene X = 0.67%
𝟏𝟎𝟏𝟓𝟔 − 𝟖𝟎𝟎𝟐
𝟖%
=
𝟏𝟎𝟎𝟎𝟎 − 𝟖𝟎𝟎𝟐
𝒀
De donde se tiene Y = 7.42%
Sumando todo nos da: 0.67% + 28% + 7.42% = 36.09%
II. A continuación, se presentael resultadodel análisisdelpreciode unacámaraCANON modelo
SX620 en 200 establecimientos del Perú.
1. (3 punto) Identificalavariable yel tipode gráfico
- Variable:Cuantitativadiscreta(precio)
- Tipode gráfico:HISTOGRAMA
40
80
30
20 20
10
0
10
20
30
40
50
60
70
80
90
2000-2100 2100-2200 2200-2300 2300-2400 2400-2500 2500-2600
Precio (soles)
2. (3 puntos) Llevala informacióndel gráficoaunatabla de frecuencias
Variable:
Precio
Marca de
clase
fi Fi hi% Hi%
[2000-2100[ 2050 40 40 20 20
[2100-2200[ 2150 80 120 40 60
[2200-2300[ 2250 30 150 15 75
[2300-2400[ 2350 20 170 10 85
[2400-2500[ 2450 20 190 10 95
[2500-2600] 2550 10 200 5 100
200 100
3. (2 puntos) A partir de la tabla de frecuenciasque se generadel gráfico adjuntodeterminae
interpretael porcentajedeestablecimientosque vendenlacámara,de lacaracterísticaindicada,
a precios de como mínimo S/ 2300.
Según la tabla de frecuencias el porcentaje de establecimientos que venden la cámara que
tiene como precio mínimo de S/ 2300 es: 10% + 10% + 5% = 25%
Es decir,el 25% del total de establecimientos(200) = 50 poseeneste tipo de cámara al precio
de S/ 2300.
4. (4 puntos) Determinael montomínimodel 24% superiorde losestablecimientosque
presentanlosmayorespreciosen el Perú.
Como me pidenel monto mínimodel 24% superior,esdecir 100% - 24% = 76%
Por interpolaciónse tiene:
𝟐𝟒𝟎𝟎− 𝟐𝟑𝟎𝟎
𝟏𝟎%
=
𝑿 − 𝟐𝟑𝟎𝟎
𝟏%
X = 2310
Es decir, el monto mínimodel 24% superiores el valor inmediatoenterode “X”,de donde el
monto mínimopedidoes S/ 2311.

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Trabajo estadistica

  • 1. TRABAJO ESTADISTICA PRESENTACIÓN Y ANÁLISIS ESTADÍSTICO: I. En la empresaNiñaValiente,se tomóunamuestrarepresentativade mujerestrabajadorasde diferentesáreaspara evaluarel gastoque representalaescolaridadde susmenoreshijosenel mes de marzo, con la finalidad de realizar una campaña escolar que beneficie a dichas colaboradoras. Los resultados se observan a continuación: 1. (4 puntos) Propón 2 tipos de gráficos con los que representarías dicha información y sustenta dicha elección. La elecciónde este gráficoesporque representa exactamentelainformacióndadaenlatabla de frecuencias(frecuenciaabsolutavsgastos),esdecirhay 7 trabajadoras que tienenungasto entre S/ 1540 y S/ 3694 con un gasto promedio de S/ 2617 (marca de clase). Gasto Marca de clase fi Fi hi% Hi% [1540-3694[ 2617 7 7 14 14 [3694-5848[ 4771 15 22 30 44 [5848-8002[ 6925 14 36 28 72 [8002-10156[ 9079 4 40 8 80 [10156-12310] 11233 10 50 20 100 Total 50 100
  • 2. Este tipo de gráfico representalos datos de frecuenciaabsolutavs la marca de clase, esdecir que hay 15 trabajadoras que tienenungasto promediode S/ 4771. Este tipo de gráfico representa los datos de frecuencia absoluta acumulada vs limites inferiores, es decir que hay 36 trabajadoras que tienen un gasto entre S/ 1540 y S/ 8002. 2. (4 puntos) Determinae interpretael porcentajede trabajadoresque gastaunmontodesde S/5800 pero menora S/ 10 000.
  • 3. Nos piden el porcentaje de trabajadoras que gastan un monto desde S/ 5800 a S/ 10000, es decir: X + 28% + Y Por interpolación se tiene: 𝟓𝟖𝟒𝟖 − 𝟑𝟔𝟗𝟒 𝟑𝟎% = 𝟓𝟖𝟒𝟖 − 𝟓𝟖𝟎𝟎 𝑿 De donde se tiene X = 0.67% 𝟏𝟎𝟏𝟓𝟔 − 𝟖𝟎𝟎𝟐 𝟖% = 𝟏𝟎𝟎𝟎𝟎 − 𝟖𝟎𝟎𝟐 𝒀 De donde se tiene Y = 7.42% Sumando todo nos da: 0.67% + 28% + 7.42% = 36.09% II. A continuación, se presentael resultadodel análisisdelpreciode unacámaraCANON modelo SX620 en 200 establecimientos del Perú. 1. (3 punto) Identificalavariable yel tipode gráfico - Variable:Cuantitativadiscreta(precio) - Tipode gráfico:HISTOGRAMA 40 80 30 20 20 10 0 10 20 30 40 50 60 70 80 90 2000-2100 2100-2200 2200-2300 2300-2400 2400-2500 2500-2600 Precio (soles)
  • 4. 2. (3 puntos) Llevala informacióndel gráficoaunatabla de frecuencias Variable: Precio Marca de clase fi Fi hi% Hi% [2000-2100[ 2050 40 40 20 20 [2100-2200[ 2150 80 120 40 60 [2200-2300[ 2250 30 150 15 75 [2300-2400[ 2350 20 170 10 85 [2400-2500[ 2450 20 190 10 95 [2500-2600] 2550 10 200 5 100 200 100 3. (2 puntos) A partir de la tabla de frecuenciasque se generadel gráfico adjuntodeterminae interpretael porcentajedeestablecimientosque vendenlacámara,de lacaracterísticaindicada, a precios de como mínimo S/ 2300. Según la tabla de frecuencias el porcentaje de establecimientos que venden la cámara que tiene como precio mínimo de S/ 2300 es: 10% + 10% + 5% = 25% Es decir,el 25% del total de establecimientos(200) = 50 poseeneste tipo de cámara al precio de S/ 2300. 4. (4 puntos) Determinael montomínimodel 24% superiorde losestablecimientosque presentanlosmayorespreciosen el Perú. Como me pidenel monto mínimodel 24% superior,esdecir 100% - 24% = 76% Por interpolaciónse tiene: 𝟐𝟒𝟎𝟎− 𝟐𝟑𝟎𝟎 𝟏𝟎% = 𝑿 − 𝟐𝟑𝟎𝟎 𝟏% X = 2310 Es decir, el monto mínimodel 24% superiores el valor inmediatoenterode “X”,de donde el monto mínimopedidoes S/ 2311.