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Actualizados soluciones de ejercicios
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title: "Ejercicios Tema 4 - Complementos de Variables aleatorias" | ||
author: "Ricardo Alberich, Juan Gabriel Gomila y Arnau Mir" | ||
date: "Curso de Probabilidad y Variables Aleatorias con R y Python" | ||
output: | ||
pdf_document: default | ||
html_document: | ||
df_print: paged | ||
header-includes: \usepackage{amsmath} | ||
--- | ||
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```{r setup, include=FALSE} | ||
knitr::opts_chunk$set(echo = TRUE) | ||
``` | ||
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\newcommand\momento{m} | ||
\newcommand{\momentocentral}{\mu} | ||
\newcommand{\FunGenMom}{m} | ||
\newcommand{\FunCar}{\phi} | ||
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# Momentos y momentos centrados. Asimetría y apuntamiento. | ||
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## Pregunta 1. | ||
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Halla el momento de orden $n$ y el momento centrado de orden $n$ para la variable aleatoria $W$ con función de distribución: | ||
$$ | ||
F_W (t)= | ||
\left\{\begin{array}{ll} | ||
0, & \mbox{si $t<3$}, | ||
\\[0.1cm] | ||
\frac13, & \mbox{si $3\leq t<4$}, | ||
\\[0.1cm] | ||
\frac12, & \mbox{si $4\leq t<5$}, | ||
\\[0.1cm] | ||
\frac23, & \mbox{si $5\leq t<6$}, | ||
\\[0.1cm] | ||
1, & \mbox{si $t\geq 6$}, | ||
\end{array}\right. | ||
$$ | ||
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## Pregunta 2. | ||
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Halla el momento de orden $n$ y el momento central de orden $n$ para la variable aleatoria $Z$ con función de probabilidad: | ||
$$f_Z (x)= | ||
\left\{\begin{array}{ll} | ||
{1\over 3}, & \mbox{si $x=0,1,2$},\\ 0, & \mbox{en los otros | ||
casos.} | ||
\end{array}\right. | ||
$$ | ||
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## Pregunta 3. | ||
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Halla el momento de orden $n$ y el momento central de orden $n$ para la variable aleatoria $X$ con función de densidad: | ||
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$$ | ||
f(x)=\begin{cases} | ||
1-|x|, & \mbox{si }|x|\leq 1,\\ | ||
0, & \mbox{en caso contrario.} | ||
\end{cases} | ||
$$ | ||
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## Pregunta 4. | ||
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Halla el momento de orden $n$ y el momento central de orden $n$ para la variable aleatoria $Y$ con función de distribución: | ||
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$$ | ||
F_Y(t)= | ||
\left\{\begin{array}{ll} | ||
0, & \mbox{si $t<0$},\\ | ||
\sqrt{t}, & \mbox{si $0\leq t\leq 1$},\\ 1, & | ||
\mbox{si $t>1$}, | ||
\end{array}\right. | ||
$$ | ||
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