Table 3.

Comparison between the two groups polymethyl methacrylate and bis-acrylic) provisional restorative materials by application of the t test for equality

Group statistics
	Groups	N	Mean	Std. deviation	Std. error of mean
Total	Acrylic	30	0.237962	0.0345384	0.0063058
	Bis-acrylic	30	0.156075	0.0204187	0.0037279
Independent test
		t test for equality
		t		df	Sig (2-tailed)	Mean difference
Total	Equal variances	11.179		58	0.000	0.081887

P < 0.05

Comparison shows highly significant value