Dera Derrick,
if you have a continuous distribution with the ordered observations
x_(1), x_(2), ... ,x_(r), ... ,x_(s), ... ,x_(N) you can use the following
expression
(resulting from the binomial distribution) for determining the CI:
Pob[ x_(r)<= med <= x_(s) ]=(1/2)^N sum_(i=r, r+1,...,s-1) (N over i)
asymtotically (works well for N>15) use
r=N/2 - u_(alpha/2) sqrt(N/4)
(rounding down) for the lower and
s=N-r+1
for the upper bound.
Kind regards
Robert Németh
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|