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Metodos Estadisticos II (Hector Medina Disla)

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Una fábrica de cigarros va alanzar al mercado una nueva de linea de cigarros. Antes de hacer lanzamiento, el gerente de mercadeo contacta, a través de su personal clave, a un grupo de fumadores a los que les entrega un kit de cigarros sin identificar y le entrega un formulario que el fumador debe llenar para cada uno de los cigarros recibidos. El fumador que recibe el kit de cigarros decide si devuelve el formulario lleno o no. Seleccione la respuesta correcta para las siguientes preguntas

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¿Cuál es el procedimiento de muestreo utilizado por el investigador?

¿Cuál es la unidad de análisis en este caso?

¿Cuál es el marco muestral utilizado por el gerente de mercadeo?

¿Cuál es el tipo de muestra utilizado por el investigador?

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En el muestreo no probabilístico todos los elementos de la población tienen la misma probabilidad de ser incluido en la muestra. &lt;!-- /* Font Definitions */ @font-face {font-family:&quot;Cambria Math&quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&quot;&quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:&quot;Times New Roman&quot;,serif; mso-fareast-font-family:&quot;Times New Roman&quot;;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; mso-ansi-language:ES; mso-fareast-language:ES;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&gt;&amp;lt;!-- /* Font Definitions */ @font-face {font-family:&amp;quot;Cambria Math&amp;quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&amp;quot;&amp;quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:&amp;quot;Times New Roman&amp;quot;,serif; mso-fareast-font-family:&amp;quot;Times New Roman&amp;quot;;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; mso-ansi-language:ES; mso-fareast-language:ES;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&amp;gt;

True

False

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La divición de manufacturas de una empresa desea estimar el tiempo promedio que tardan los operadores de ciertas máquinas en realizar una tarea. Por experiencias anteriores se sabe que la desviación estándar del tiempo que tardan los operarios en finalizar una tarea es de 1.04 minutos. Se desea una estimación con un nivel de confianza de 95.0% y un margen de error de ±0.5 minutos. ¿Que tamaño debe tener la muestra? &amp;amp;lt;!-- /* Font Definitions */ @font-face {font-family:&amp;amp;quot;Cambria Math&amp;amp;quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:&amp;amp;quot;Bookman Old Style&amp;amp;quot;; panose-1:2 5 6 4 5 5 5 2 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:647 0 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&amp;amp;quot;&amp;amp;quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:&amp;amp;quot;Times New Roman&amp;amp;quot;,serif; mso-fareast-font-family:&amp;amp;quot;Times New Roman&amp;amp;quot;; mso-font-kerning:14.0pt; mso-fareast-language:EN-US; mso-bidi-font-weight:bold;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&amp;amp;gt;

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Se va a establecer una nueva ruta de transporte interurbano y uno de los aspectos que interesa a los inversionistas es poder estimar de cuántos serán los ingresos mensuales promedio por conceptos de ventas de pasajes. Los estudios anteriores muestran que el gasto mensual promedio en transporte del público que utiliza estos servicios es de 1,230$. Si los inversionistas desean una estimación con un nivel de confianza de 95.0% y un margen de error de ±200$. ¿Que tamaño debe tener la muestra? &amp;amp;amp;lt;!-- /* Font Definitions */ @font-face {font-family:&amp;amp;amp;quot;Cambria Math&amp;amp;amp;quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:&amp;amp;amp;quot;Bookman Old Style&amp;amp;amp;quot;; panose-1:2 5 6 4 5 5 5 2 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:647 0 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&amp;amp;amp;quot;&amp;amp;amp;quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:&amp;amp;amp;quot;Times New Roman&amp;amp;amp;quot;,serif; mso-fareast-font-family:&amp;amp;amp;quot;Times New Roman&amp;amp;amp;quot;; mso-font-kerning:14.0pt; mso-fareast-language:EN-US; mso-bidi-font-weight:bold;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&amp;amp;amp;gt;

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De una población de 16,000 voluntarios que participan en un programa se va a tomar una muestra con el objetivo de conocer el porcentaje de ellos que se siente satisfecho con el trabajo realizado. En una encuesta pasada se encontró que el 80.0% de ellos estaba satisfecho con el trabajo realizado. ¿Cuál debe ser el tamaño de la muestra si se desea una estimación con un nivel de confianza de 95% y un margen de error de ± 3.5%?

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De una población de jóvenes se desea seleccionar una muestra para conocer el porcentaje de ellos con conocimiento sobre salud sexual y reproductiva. La estimación se desea con un nivel deconfianza de 90.0% y un margen de error de ±5.0%. ¿Que tamaño debe tener la muestra?

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Se va a seleccionar una muestra para determinar el porcentaje de personas con trastorno con depresión. Se desea una estimación con un margen deerror de ± 5.0%. ¿El tamaño de la muestra será?

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a. 348 promedio

b. 384%

c. 384 personas

100%

d. 348 personas

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Se va a seleccionar una muestra para conocer el porcentaje de votantes que están a favor del candidato YOSIGANO NUNCAPIERDE. Se desea una muestra que tenga un nivel de confianza de 99.0% y un margen de error de ±3.0%. ¿Que tamaño debe tener la muestra? &lt;!-- /* Font Definitions */ @font-face {font-family:&quot;Cambria Math&quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:&quot;Bookman Old Style&quot;; panose-1:2 5 6 4 5 5 5 2 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:647 0 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&quot;&quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:&quot;Times New Roman&quot;,serif; mso-fareast-font-family:&quot;Times New Roman&quot;; mso-font-kerning:14.0pt; mso-fareast-language:EN-US; mso-bidi-font-weight:bold;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&gt;

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Una entidad gubernamental desea estimar el consumo promedio mensual de ciertas hortalizas. Los estudios anteriores muestran que el consumo de dichas hortalizas tiene una desviación estándar de 500$. Si se desea una estimación con un nivel de confianza de 95.0% y un margen de error de ±50$. ¿Cuál debe ser tamaño de la muestra? &amp;amp;amp;lt;!-- /* Font Definitions */ @font-face {font-family:&amp;amp;amp;quot;Cambria Math&amp;amp;amp;quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;}@font-face {font-family:&amp;amp;amp;quot;Bookman Old Style&amp;amp;amp;quot;; panose-1:2 5 6 4 5 5 5 2 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:647 0 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&amp;amp;amp;quot;&amp;amp;amp;quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; mso-bidi-font-size:10.0pt; font-family:&amp;amp;amp;quot;Times New Roman&amp;amp;amp;quot;,serif; mso-fareast-font-family:&amp;amp;amp;quot;Times New Roman&amp;amp;amp;quot;; mso-font-kerning:14.0pt; mso-fareast-language:EN-US; mso-bidi-font-weight:bold;}.MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;}@page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;}div.WordSection1 {page:WordSection1;}--&amp;amp;amp;gt;

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Se va a realizar un estudio con el objetivo de determinar el nivel promedio de plomo en la sangre de niños menores de seis años. En estudios anteriores se ha encontrado que el nivel promedio de plomo en la sangre es de 12.25 miligramos por decilitro con una desviación estándar de 8.04 miligramos por decilitro. Qué tamaño debe tener la muestra si el investigador quiere asegurar una confiabilidad de 95.0% y un margen de error que no pase de 1.5 miligramos por decilitro.

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