Analyzing soil contamination status in garage and auto mechanical workshops of Shashemane City: implication for hazardous waste management

Environmental Systems Research

Table 3 ANOVA table for testing the significance of the concentration of different element with service year of garages

	Sum of squares	df	Mean square	F	Sig.
Cr × service year
Between groups	623,992.2	2	311,996.1	4.196	0.024
Within groups	2,453,674.9	33	74,353.8
Total	3,077,667.1	35
Pb × service year
Between groups	5,026,561.8	2	2,513,280.9	2.356	0.111
Within groups	35,202,359.9	33	1,066,738.1
Total	40,228,921.8	35
Ni × service year
Between groups	1,306,603.1	2	653,301.568	2.264	0.120
Within groups	9,523,424.404	33	288,588.618
Total	10,830,027.5	35
Cd × service year
Between groups	39,811.9	2	19,905.9	1.737	0.192
Within groups	378,225.7	33	11,461.4
Total	418,037.6	35
CO × service year
Between groups	338,752.4	2	169,376.2	0.877	0.426
Within groups	6,375,158.8	33	193,186.6
Total	6,713,911.2	35
pH × service year
Between groups	2.5	2	1.2	1.198	0.315
Within groups	34.2	33	1.0
Total	36.7	35
EC × service year
Between groups	310,882.3	2	155,441.1	0.485	0.620
Within groups	10,565,662.0	33	320,171.6
Total	10,876,544.3	35
SOM × service year
Between groups	115.7	2	57.9	0.422	0.659
Within groups	4525.7	33	137.1
Total	4641.4	35