SR-260N_English_090324.rtf SIZE: 135x75mm / SCALE 2:1 / 2009/3/24
E16
Σx2 sum of the squares
x
mean value
S Sample Standard deviation
1
/)( 22
−
Σ−Σ
n
nxx
σ Population standard deviation
n
nxx /)( 22 Σ−Σ
CP Precision capability
σ
6
LSLUSL −
CPK Process capability Min(CPU, CPL)
where CPU =
σ
3
xUSL − CPL =
σ
3
LSLx −
(Note) : In STAT mode, all function key are available, except base-n
calculation.
(Ex. 1) : Enter the following data to calculate Σx, Σx2, n,
x
, S,
CP, and CPK , where data 1 = 2, data 2~5 = 5, data 6~8 =
9, USL value : 12, LSL value : 2
DEG STAT
In STAT mode [ 2ndF ] [ STAT ] 0.00
DEG STAT
[ DATA ] 2 2.
DEG STAT
[ DATA ] 5 5.
DEG STAT
[ DATA ] 5 5.
DEG STAT
[ DATA ] 5 5.
DEG STAT
[ DATA ] 5 5.
DEG STAT
[ DATA ] 9 9.
DEG STAT
[ DATA ] 9 9.
DEG STAT
[ DATA ] 9 9.
DEG STAT
Enter all data
[ = ] 0.00
DEG STAT
x
= ? [
x
] 6.13
DEG STAT
n = ? [ n ] 8.00
DEG STAT
S = ? [ S ] 2.59
DEG STAT
Σx = ? [ 2ndF] [Σx ] 49.00