Table 2: t-test between groups (Type III dental stone).

Groups t P- Value C.S
Type III/ Time3 hr./Mic. - Type III /Time3 hr. /Air. 3.611 .006 P<0.01 (HS)
Type III/ Time5 hr./ Mic. - Type III /Time5 hr. /Air. 1.506 .166 P>0.05(NS)
Type III/ Time24 hr./ Mic. - Type III/Time24 hr. /Air. 6.147 .000 P<0.01 (HS)