. 2016 Apr 21;8(2):94–100. doi: 10.4047/jap.2016.8.2.94

Table 3. The mean and standard deviation of shear bond strength.

Group	Mean (in MPa)	Standard deviation	Standard error	95% Confidential interval
Group	Mean (in MPa)	Standard deviation	Standard error	Lower	Upper
Control	8.3247^a	3.11197	0.73350	6.7771	9.8722
Silane	20.3280^bc	6.08263	1.43369	17.3032	23.3528
H₂O₂ + Silane	17.6739^b	4.24649	1.00091	15.5622	19.7857
H₂O₂ + Silane + Heat (80℃)	22.2854^c	5.35972	1.26330	19.6201	24.9507

Different superscript letters indicate significant differences. For example, mean values between Group 2 and 3 are not significantly different (P < .05).