Determination of nitrogen (%)									
7.53									
7.45									
7.58								outlier =	7.88
7.45									
7.41									
7.31									
7.65									
7.57									
7.54									
7.47									
7.4									
7.88									
									
									
									
									
									
									
									
									
									
									
Rank:		frequency	class	relative freq.					
7.31		2	"7,31-7,40"	0.18					
7.4		4	"7,4-7,5"	0.36					
7.41		4	"7,51-7,60"	0.36					
7.45		1	"7,61-7,7"	0.09					
7.45									
7.47									
7.53									
7.54									
7.57									
7.58									
7.65									
									
									
									
									
									
Confidence interval:									
									
									
									
									
									
N=	11		s.e.m. =	0.03					
Average=	7.49		L1=	7.42					
S=	0.10		L2=	7.55					
									
t=	2.23		"Interval: (7,42;7,55)"						
alpha=	0.05