# Test of nonparametric ANOVA for dependent ordinal measures - Page test
use strict;
use warnings;
use Test::More tests => 9;
use constant EPS => 1e-2;
BEGIN { use_ok('Statistics::ANOVA') }
my $aov = Statistics::ANOVA->new();
isa_ok( $aov, 'Statistics::ANOVA' );
# Example from Hollander & Wolfe (1999), p. 286ff:
my @p1 = ( 7.46, 7.68, 7.21 );
my @p2 = ( 7.17, 7.57, 7.80 );
my @p3 = ( 7.76, 7.73, 7.74 );
my @p4 = ( 8.14, 8.15, 7.87 );
my @p5 = ( 7.63, 8.00, 7.93 );
my %ref_vals = (
y_value => 206.5,
y_exp => 105,
y_var => 433.2,
l_value => 158,
l_exp => 135,
l_var => 75,
z_value => 2.66,
p_value => .0039,
);
eval {
$aov->load_data(
{ 1 => \@p1, 2 => \@p2, 3 => \@p3, 4 => \@p4, 5 => \@p5 } );
};
ok( !$@, $@ );
eval {
$aov->anova(
independent => 0,
parametric => 0,
ordinal => 1,
f_equiv => 0
);
};
ok( !$@, $@ );
ok(
about_equal( $aov->{'_stat'}->{'l_value'}, $ref_vals{'l_value'} ),
"Dependent Nonparametric Trend:l_value: $aov->{'_stat'}->{'l_value'} = $ref_vals{'l_value'}"
);
ok(
about_equal( $aov->{'_stat'}->{'l_exp'}, $ref_vals{'l_exp'} ),
"Dependent Nonparametric Trend:l_exp: $aov->{'_stat'}->{'l_exp'} = $ref_vals{'l_exp'}"
);
ok(
about_equal( $aov->{'_stat'}->{'l_var'}, $ref_vals{'l_var'} ),
"Dependent Nonparametric Trend:l_var: $aov->{'_stat'}->{'l_var'} = $ref_vals{'l_var'}"
);
ok(
about_equal( $aov->{'_stat'}->{'z_value'}, $ref_vals{'z_value'} ),
"Dependent Nonparametric Trend:z_value: $aov->{'_stat'}->{'z_value'} = $ref_vals{'z_value'}"
);
ok(
about_equal( $aov->{'_stat'}->{'p_value'}, $ref_vals{'p_value'} ),
"Dependent Nonparametric Trend:p_value: $aov->{'_stat'}->{'p_value'} = $ref_vals{'p_value'}"
);
sub about_equal {
return 0 if !defined $_[0] || !defined $_[1];
return 1 if $_[0] + EPS > $_[1] and $_[0] - EPS < $_[1];
return 0;
}
1;