Lab 6 - Heitor Faria - Lab 6 Intervalos de Conana...

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13/09/2016 Lab 6 - Intervalos de Confiança 1/5 Lab 6 ­ Intervalos de Confiança Professor Dr. Donald Pianto 13 de setembro, 2016 Aluno: Heitor Medrado de Faria Participantes: Carrega os dados ames: load ("~/Documentos/LabsAlunos/lab6/ames.RData") Especifique uma semente: set.seed (89) Exercícios: Exercício 1: De acordo com a amostra, os valores máximo e mínimo para a variável área são: 498 e 3086 pés quadrados, respectivamente, e a média 1505 pés quadrados: que pode ser considerado o valor mais tipico. set.seed (89) n <- 60 amostra <- sample_n (ames, n) amostra %>% select (area) %>% summary () ## area ## Min. : 498 ## 1st Qu.:1145 ## Median :1516 ## Mean :1505 ## 3rd Qu.:1716 ## Max. :3086 Exercício 2: A distribuição de outro aluno muito provavelemente será diferente, pois estou especificando uma semente minha a cada passo. No entento, os valores provavelmente seriam próximos, pois estão retirando amostras na mesma população. set.seed (89) Exercício 3: Para que o intervalo de confiança ser válido a amostra precisa ser aleatória, a distribuição dos valores normal e uma amostra de tamanho significativo.
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