normal.select {LearnBayes} | R Documentation |
Finds the mean and standard deviation of a normal density that matches knowledge of two quantiles of the distribution.
normal.select(quantile1, quantile2)
quantile1 |
list with components p, the value of the first probability, and x, the value of the first quantile |
quantile2 |
list with components p, the value of the second probability, and x, the value of the second quantile |
mean |
mean of the matching normal distribution |
sigma |
standard deviation of the matching normal distribution |
Jim Albert
# 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)