function normal_01_sample_test ( )

%*****************************************************************************80
%
%% normal_01_sample_test() tests normal_01_mean(), normal_01_sample(), normal_01_variance().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    14 February 2003
%
%  Author:
%
%    John Burkardt
%
  nsample = 1000;

  fprintf ( 1, '\n' );
  fprintf ( 1, 'NORMAL_01_SAMPLE_TEST():\n' );
  fprintf ( 1, '  NORMAL_01_MEAN() computes the Normal 01 mean;\n' );
  fprintf ( 1, '  NORMAL_01_SAMPLE() samples the Normal 01 PDF;\n' );
  fprintf ( 1, '  NORMAL_01_VARIANCE() returns the Normal 01 variance.\n' );

  xmean = normal_01_mean ( );
  variance = normal_01_variance ( );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF mean =      %14f\n', xmean );
  fprintf ( 1, '  PDF variance =  %14f\n', variance );

  for i = 1 : nsample
    x(i) = normal_01_sample ( );
  end

  xmean = mean ( x );
  variance = r8vec_variance ( nsample, x );
  xmax = max ( x );
  xmin = min ( x );

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

  return
end
