1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
\name{normal.select}
\alias{normal.select}
\title{Selection of Normal Prior Given Knowledge of Two Quantiles}
\description{
Finds the mean and standard deviation of a normal density that matches knowledge of
two quantiles of the distribution.
}
\usage{
normal.select(quantile1, quantile2)
}
\arguments{
\item{quantile1}{list with components p, the value of the first probability,
and x, the value of the first quantile}
\item{quantile2}{list with components p, the value of the second probability,
and x, the value of the second quantile}
}
\value{
\item{mean}{mean of the matching normal distribution}
\item{sigma}{standard deviation of the matching normal distribution}
}
\author{Jim Albert}
\examples{
# person believes the 15th percentile of the prior is 100
# and the 70th percentile of the prior is 150
quantile1=list(p=.15,x=100)
quantile2=list(p=.7,x=150)
normal.select(quantile1,quantile2)
}
\keyword{models}
|
