Table 5.

Intergroup comparison of instrumentation time (minutes)

Instrumentation time		N	Mean	Std.deviation	95% Confidence interval for mean
					Lowerbound	Upperbound
Time in minutes	Group I(Ni-Ti K files)	15	9.4107	0. 85045	8.9397	9.8816
	Group II(ProTaper Next files)	15	5.8313	1.04413	5.2531	6.4096
	Group III(One Shape file)	15	3.4473	0.58773	3.1219	3.7728
	Group IV(Wave One file)	15	1.8313	0.42487	1.5960	2.0666
Pavalue		< 0.0001, S
pairwise comparisonPost hoc		Group I < group II < group III < group IV

Tukey's test.^b One way ANOVA, ^a