set1		set2
	16.38		16.84
	19.15		15.46
	19.1		14.41
	12.45		18.1
	19.28		16.99
	19.12		15.11
	18.85		15.1
	18.1		
	19		
	17.77		
			
			
			
			
			
			
outlier is removed 			
	set1		set2
	16.38		16.84
	19.15		15.46
	19.1		14.41
	17.77		18.1
	19.28		16.99
	19.12		15.11
	18.85		15.1
	18.1		
	19		
			
N	9		7
variance	0.916019444		1.752914286
mean	18.52777778		16.00142857
			
H0 the data sets belong to the same population			
F	1.913621262		
"f, critical "	5.599623005		
H0 is accepted\			
			
			
			
dof	14		
s^2p	1.274688662		
T	4.440190496		
"T,critical"	2.144786688		
			
T>Tcritical			
H0 os rejected