Section 39 ANOVA with Blocking: Estimated Effects

39.1 Estimates: Effects

$$\large fm \leftarrow lm(SBP \sim Centre + Group + DM + Group:DM, \space data=BP)$$

$$\large summary(fm)$$

	Estimate	Std. Error	t value	Pr(>|t|)
(Intercept)	99.905	0.9808	101.8621	0.0000
CentreH2	-0.375	0.8953	-0.4188	0.6758
CentreH3	0.225	0.8953	0.2513	0.8019
CentreH4	0.125	0.8953	0.1396	0.8891
CentreH5	0.500	0.8953	0.5585	0.5772
GroupB	-2.400	1.1325	-2.1192	0.0354
GroupC	2.760	1.1325	2.4371	0.0157
GroupD	4.840	1.1325	4.2737	0.0000
DMY	4.200	1.1325	3.7086	0.0003
GroupB:DMY	1.960	1.6016	1.2238	0.2226
GroupC:DMY	2.720	1.6016	1.6983	0.0911
GroupD:DMY	6.080	1.6016	3.7962	0.0002

39.2 Interaction Plot

with(data = BP, interaction.plot(x.factor = Group, trace.factor = DM, response = SBP, col = c("blue", "red"), lty = 1, lwd = 2))