Confidence Interval for the Median
Calculates the confidence interval for the median.
MedianCI(x, conf.level = 0.95, sides = c("two.sided", "left", "right"), na.rm = FALSE, method = c("exact", "boot"), R = 999)
a (non-empty) numeric vector of data values.
confidence level of the interval
a character string specifying the side of the confidence interval, must be one of
"right". You can specify just the initial letter.
"left" would be analogue to a hypothesis of
"greater" in a
logical. Should missing values be removed? Defaults to
defining the type of interval that should be calculated (one out of
"boot"). Default is
"exact". See Details.
The number of bootstrap replicates. Usually this will be a single positive integer. See
boot.ci for details.
The exact method is the way SAS is said to calculate the confidence interval. This is implemented in
SignTest and is extracted from there.
The boot confidence interval type is calculated by means of
boot.ci with default type
apply, to get the confidence intervals from a data.frame or from a matrix.
MedianCI(d.pizza$price, conf.level=0.99, na.rm=TRUE)
t(round(sapply(d.pizza[,c("delivery_min","temperature","price")], MedianCI, na.rm=TRUE), 3))
MedianCI(d.pizza$price, na.rm=TRUE, method="exact")
MedianCI(d.pizza$price, na.rm=TRUE, method="boot")