function [] = chap_8_prob_5()
% 
% Written by:
% -- 
% John L. Weatherwax                2007-04-02
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

nTimesSigma = 50/sqrt(12); 
z = 3/nTimesSigma; 
2*normcdf(-z)