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Intervalo de confiança para normal variância desconhecida
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| # Fonte: http://www.leg.ufpr.br/Rpira/Rpira/node11.html | |
| ic.m <- function(x, conf = 0.95){ | |
| n <- length(x) | |
| media <- mean(x) | |
| variancia <- var(x) | |
| quantis <- qt(c((1-conf)/2, 1 - (1-conf)/2), df = n-1) | |
| ic <- media + quantis * sqrt(variancia/n) | |
| return(ic) |
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