The Company of Biologists

Table 3.

Analysis of variance table for models 1, 2 and 3

Model	Source of variation	d.f.	SS	MSS	F ratio
Model 1	Regression	2	161 050	80 525	16 296.2*
	Residual	4671	23 081	5
	Total	4673	184 131
Model 2	Regression	4	161 107	40 277	8055.4*
	Residual	4669	23 024	5
	Total	4673	184 131
Model 2—model 1	Due to treatment	2	57	28.5	5.8*
	Residual	4669	23 024	5
Model 3	Regression	8	161 537	20 192	4168.9*
	Residual	4665	22 594	5
	Total	4673	184 131
Model 3—model 2	Due to cage	4	430	107.5	22.2*
	Residual	4665	22 594	5

Model	Source of variation	d.f.	SS	MSS	F ratio
Model 1	Regression	2	161 050	80 525	16 296.2*
	Residual	4671	23 081	5
	Total	4673	184 131
Model 2	Regression	4	161 107	40 277	8055.4*
	Residual	4669	23 024	5
	Total	4673	184 131
Model 2—model 1	Due to treatment	2	57	28.5	5.8*
	Residual	4669	23 024	5
Model 3	Regression	8	161 537	20 192	4168.9*
	Residual	4665	22 594	5
	Total	4673	184 131
Model 3—model 2	Due to cage	4	430	107.5	22.2*
	Residual	4665	22 594	5

d.f., degrees of freedom; SS, sums of squares; MSS, mean SS. The asterisks indicate that the regression is significant at the P=0.05 significance level.