function normal_sample_test ( )

%*****************************************************************************80
%
%% NORMAL_SAMPLE_TEST tests NORMAL_MEAN, NORMAL_SAMPLE, NORMAL_VARIANCE.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    14 February 2003
%
%  Author:
%
%    John Burkardt
%
  nsample = 1000;
  seed = 123456789;

  fprintf ( 1, '\n' );
  fprintf ( 1, 'NORMAL_SAMPLE_TEST\n' );
  fprintf ( 1, '  NORMAL_MEAN computes the Normal mean;\n' );
  fprintf ( 1, '  NORMAL_SAMPLES samples the Normal distribution;\n' );
  fprintf ( 1, '  NORMAL_VARIANCE returns the Normal variance.\n' );

  mu = 100.0;
  sigma = 15.0;

  check = normal_check ( mu, sigma );

  if ( ~ check );
    fprintf ( 1, '\n' );
    fprintf ( 1, 'NORMAL_SAMPLE_TEST - Fatal error!\n' );
    fprintf ( 1, '  The parameters are not legal.\n' );
    return
  end

  mean = normal_mean ( mu, sigma );
  variance = normal_variance ( mu, sigma );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF parameter MU =    %14g\n', mu );
  fprintf ( 1, '  PDF parameter SIGMA = %14g\n', sigma );
  fprintf ( 1, '  PDF mean =            %14g\n', mean );
  fprintf ( 1, '  PDF variance =        %14g\n', variance );

  [ x, seed ] = normal_samples ( nsample, mu, sigma, seed );

  mean = r8vec_mean ( nsample, x );
  variance = r8vec_variance ( nsample, x );
  xmax = max ( x(1:nsample) );
  xmin = min ( x(1:nsample) );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  Sample size =     %6d\n', nsample );
  fprintf ( 1, '  Sample mean =     %14g\n', mean );
  fprintf ( 1, '  Sample variance = %14g\n', variance );
  fprintf ( 1, '  Sample maximum =  %14g\n', xmax );
  fprintf ( 1, '  Sample minimum =  %14g\n', xmin );

  return
end
