Desoutter Delta Wrench 150 Nm, Руководство пользователя, Страница: 134 / 184

Part Number
Issue
Date
Page 6159937790
12
03/2018
134 / 184
03/2018 134 (184)
9.2.3 NF standard E 60-181
s
ie
= estimator of the intrinsic standard deviation for each mode number, where k e
 
2 , and k is the
number of samples.
 
1
1
2





N
x x
S
N
i
e ie
ie
;
N
x
x
N
i
je
e

 
1
(where N is the size of the sample)



N
e
ie i
S
k
S
1
2
1
;
i i
6 S D
 
i
D
IT
C

AM (where IT (Tolerance Interval) = Max. tolerance - Min. tolerance)
 
1
1
2





N
x x
S
N
i
i
p
;
N
x
x
N
i
j
e

 
1





  

 
3
,
3
min
min max
Tol X X Tol
C
pk
p
S
IT
Cap
6

9.2.4 Normal Distribution Test: Population under 50 measurements
(Shapiro-Wilk test)
1) Calculation of S
2
:
 


 
N
i
i
x x S
1
2
2
(where
N
x
x
N
i
i



1
and N is the number of measurements of the population)