Author      : Matthew Grogan
Website     : https://github.com/mattgrogan
Name        : stats_wilson_score.sql 
Description : Oracle PL/SQL function to return the Wilson Score Interval for the given proportion. 
Citation    : Wilson E.B. J Am Stat Assoc 1927, 22, 209-212

Example:
  select 
    round(29 / 250, 4) point_estimate, 
    stats_wilson_score(29, 250, 0.10, 'LCL') lcl, 
    stats_wilson_score(29, 250, 0.10, 'UCL') ucl
  from dual;