require(File.dirname(__FILE__)+'/test_helpers.rb')


class StatsampleUMannWhitneyTestCase < MiniTest::Unit::TestCase
  def test_u_mannwhitney
    v1=[1,2,3,4,7,8,9,10,14,15].to_scale
    v2=[5,6,11,12,13,16,17,18,19].to_scale
    u=Statsample::Test::UMannWhitney.new(v1,v2)
    assert_equal(73,u.r1)
    assert_equal(117,u.r2)
    assert_equal(18,u.u)
    assert_in_delta(-2.205,u.z,0.001)
    assert_in_delta(0.027,u.z_probability,0.001)
    assert_in_delta(0.028,u.exact_probability,0.001)
  end
end