▼Nonparametric: Kruskal-Wallis Test

Kruskal-Wallis One-way Analysis of Variance for 600 Cases

The categorical values encountered during processing are

Variables	Levels					
PERIOD$ (9 levels)	a	b	c	d	e	
 	f	g	h	i	 	

Dependent Variable 	ABUNDANCE	
Grouping Variable 	PERIOD$	

Group	Count	Rank Sum	
a	56	5,702.000	
b	11	2,371.500	
c	4	689.000	
d	21	1,814.000	
e	1	600.000	
f	225	56,619.500	
g	132	43,722.000	
h	20	6,935.500	
i	130	61,846.500	

Kruskal-Wallis Test Statistic: 269.769
The p-value is 0.000 assuming chi-square distribution with 8 df.

Conover-Inman Test for All Pairwise Comparisons

Group(i)	Group(j)	Statistic	p-Value	
a	b	2.667	0.008	
a	c	1.052	0.293	
a	d	0.466	0.641	
a	e	3.817	0.000	
a	f	7.755	0.000	
a	g	11.119	0.000	
a	h	7.269	0.000	
a	i	18.082	0.000	
b	c	0.574	0.566	
b	d	2.683	0.007	
b	e	2.845	0.005	
b	f	0.902	0.367	
b	g	2.848	0.005	
b	h	2.701	0.007	
b	i	6.404	0.000	
c	d	1.217	0.224	
c	e	2.957	0.003	
c	f	1.217	0.224	
c	g	2.421	0.016	
c	h	2.463	0.014	
c	i	4.621	0.000	
d	e	3.879	0.000	
d	f	5.598	0.000	
d	g	8.056	0.000	
d	h	6.442	0.000	
d	i	12.797	0.000	
e	f	2.687	0.007	
e	g	2.070	0.039	
e	h	1.910	0.057	
e	i	0.957	0.339	
f	g	5.611	0.000	
f	h	3.152	0.002	
f	i	15.724	0.000	
g	h	0.501	0.617	
g	i	9.040	0.000	
h	i	4.150	0.000	

Dwass-Steel-Chritchlow-Fligner Test for All Pairwise Comparisons

Group(i)	Group(j)	Statistic	p-Value	
a	b	-32.242	0.000	
a	c	-63.833	0.000	
a	d	-23.964	0.000	
a	e	-135.013	0.000	
a	f	73.022	0.000	
a	g	40.738	0.000	
a	h	-14.837	0.000	
a	i	44.002	0.000	
b	c	-11.859	0.000	
b	d	4.695	0.025	
b	e	-24.461	0.000	
b	f	163.632	0.000	
b	g	96.096	0.000	
b	h	11.919	0.000	
b	i	99.169	0.000	
c	d	20.662	0.000	
c	e	-7.000	0.000	
c	f	275.705	0.000	
c	g	161.983	0.000	
c	h	25.633	0.000	
c	i	161.952	0.000	
d	e	-49.068	0.000	
d	f	121.906	0.000	
d	g	72.010	0.000	
d	h	5.997	0.001	
d	i	73.247	0.000	
e	f	548.830	0.000	
e	g	320.918	0.000	
e	h	46.476	0.000	
e	i	316.009	0.000	
f	g	-19.206	0.000	
f	h	-113.350	0.000	
f	i	-6.731	0.000	
g	h	-65.717	0.000	
g	i	8.107	0.000	
h	i	70.882	0.000