Contents

require File.dirname(__FILE__)+'/../lib/statsample'
require 'test/unit'

class StatsampleReliabilityTestCase < Test::Unit::TestCase

	def initialize(*args)
		super
        @x1=[1,1,1,1,2,2,2,2,3,3,3,30].to_vector(:scale)
        @x2=[1,1,1,2,2,3,3,3,3,4,4,50].to_vector(:scale)
        @x3=[2,2,1,1,1,2,2,2,3,4,5,40].to_vector(:scale)
        @x4=[1,2,3,4,4,4,4,3,4,4,5,30].to_vector(:scale)
        @ds={'x1'=>@x1,'x2'=>@x2,'x3'=>@x3,'x4'=>@x4}.to_dataset
	end
   
    def test_general
        ia=Statsample::Reliability::ItemAnalysis.new(@ds)
        assert_in_delta(0.980,ia.alpha,0.001)
        assert_in_delta(0.999,ia.alpha_standarized,0.001)
        assert_in_delta(0.999,ia.item_total_correlation()['x1'],0.001)
        assert_in_delta(1050.455,ia.stats_if_deleted()['x1'][:variance_sample],0.001)
    end	
    def test_icc
        #p @x1.factors
        icc=Statsample::Reliability::ItemCharacteristicCurve.new(@ds)
        # Need to create the test!!!!
        #p icc.curve_field('x1',1).sort
        #p icc.curve_field('x1',2).sort
        #p icc.curve_field('x1',3).sort
        #p icc.curve_field('x1',30).sort
        
    end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
statsample-0.3.0	test/test_reliability.rb
statsample-0.3.1	test/test_reliability.rb
statsample-0.3.2	test/test_reliability.rb