Table 3. Analysis of variance (ANOVA) used to test significant differences of lifespan between types of dog (mongrel, cross-bred, cross breed).

Source	Type III sum of squares	df	Mean square	F	Sig.
Corrected Model	6,140.12	2	3,070.06	211.84	<0.001
Intercept	1,733,638.69	1	1,733,638.69	119,626.32	<0.001
Dog group	6,140.12	2	3,070.06	211.84	<0.001
Error	441,531.33	30,467	14.49
Total	4,294,503.46	30,470
Corrected Total	447,671.45	30,469