Number 	Nitrogen %	Class	Frequency	Q1	Q3	IQR	Upper Bound	Lower bound
1	7.31	"7,31-7,4"	2	7.45	7.58	0.13	7.775	7.255
2	7.4	"7,41-7,5"	4					
3	7.41	"7,51-7,6"	4					
4	7.45	"7,61-7,7"	1					
5	7.45							
6	7.47							
7	7.53		Average	7.487272727				
8	7.54		Mediane	7.47				
9	7.57		S	0.097271878				
10	7.58		S²	0.009461818				
11	7.65							
								
Total	11		Normal	1				
								
								
12	7.88	outlier	P	0.05				
			v	10				
student			t	2.228138852				
								
								
								
								
								
L1	7.42							
L2	7.55