Citizen SR-260N Instruction Manual page 17

2
Σ x sum of the squares
mean value
x
S Sample Standard deviation
Population standard deviation
σ
USL −
CP Precision capability
CPK Process capability Min(CPU, CPL)
USL −
x
where CPU =
σ
3
(Note) : In STAT mode, all function key are available, except base-n
calculation.
(Ex. 1) : Enter the following data to calculate Σ x, Σ x
CP, and CPK , where data 1 = 2, data 2~5 = 5, data 6~8 =
9, USL value : 12, LSL value : 2
In STAT mode [ 2ndF ] [ STAT ]
[ DATA ] 2
[ DATA ] 5
[ DATA ] 5
[ DATA ] 5
Enter all data [ DATA ] 5
[ DATA ] 9
[ DATA ] 9
[ DATA ] 9
[ = ]
= ? [ ]
x x
n = ? [ n ]
S = ? [ S ]
Σ x = ? [ 2ndF] [ Σ x ]
SR-260N_English_090324.rtf SIZE: 135x75mm
2 2
Σ − Σ
x ( x ) / n
−
n 1
2 2
Σ − Σ
x ( x ) / n
n
LSL
σ
6
x −
LSL
CPL =
σ
3
2
, n,
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
DEG
4 9. 0 0
E16
/ SCALE 2:1 / 2009/3/24
, S,
x
STAT
0. 0 0
STAT
2.
STAT
5.
STAT
5.
STAT
5.
STAT
5.
STAT
9.
STAT
9.
STAT
9.
STAT
0. 0 0
STAT
6. 1 3
STAT
8. 0 0
STAT
2. 5 9
STAT