Nonparametric confidence interval for quantile
ci = ciquant(x,p,C);
confidence level for the interval (default 0.95).
a probability defining a quantile.
a sample. if x is a matrix, the procedure is colonwise.
Nonparametric confidence interval for quantile. The returned value is the interval ci which is of the form
The interval is constructed conservatively in both ends,
that is P(q<LeftLimit) <= C/2
and similarly for the upper limit.