Table 4.

Comparison between mean retentive strength of test groups (α = 0.05)

(I) cement	(J) cement	Mean difference (MPa)	Standard error	Significant	95 % confidence interval
					Upper	Lower
PAN	UNA	−2	0.181	0	−2.45	−1.551
	UNH	0.544	0.181	0.015	0.993	0.094
UNA	PAN	2.001	0.181	0	1.551	2.45
	UNH	1.457	0.181	0	1.007	1.906
UNH	PAN	0.544	0.181	0.015	0.094	0.993
	UNA	−1.457	0.181	0	−1.906	−1.007