CITIZEN SR-281N - Manual (Page 30)

File name : CBM_SR-281N_IB_English_black_v09330.doc
Date: 2009/3/30 Trimmed Size : 140 x 75 mm SCALE 1 : 1
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Sx ( [2nd]+[ Sx ] )
Sy ( [2nd]+[ Sy ] )
Sample standard deviation of x values or y
values
σx ( [2nd]+[ σ x ] )
σy ( [2nd]+[ σ y ] )
Population standard deviation of x values or
y values
∑x ( [2nd]+[ ∑ x ] )
∑y ( [2nd]+[ ∑ y ] )
Sum of all x values or y values
∑x 2 ( [2nd]+[ ∑ x 2 ])
∑y 2 ( [2nd]+[ ∑ y 2 ])
Sum of all x 2 values or y 2 values
∑x y Sum of ( x • y ) for all x-y pairs
CP ( [2nd]+[ CP ] ) Potential capability precision of the x values
CPK ( [ CPK ] )
Minimum (CPU, CPL) of the x values, where
CPU is upper spec. limit of capability
precision and CPL is lower spec. limit of
capability precision
CPK = Min ( CPU , CPL ) = CP ( 1 – Ca )
a ( [2nd]+[ a ] ) Regression formula constant term a
b ( [2nd]+[ b ] ) Regression formula regression coefficient b
r ( [2nd]+[ r ] ) Correlation coefficient r
x ’ ([ x ’ ] ) Estimated value of x
y ’ ([ y ’ ] ) Estimated value of y
You also can add a new data anytime. The unit automatically
recalculates statistics each time you press [ DATA ] and enter a new
data value.
¾ Enter data : USL = 95, LSL = 70, DATA 1 = 75, DATA 2 = 85, DATA
3 = 90, DATA 4 = 82, DATA 5 = 77, then find out n = 5, = 81.8,
Sx = 6.05805249234, σx = 5.41848687366, CP = 0.76897236513,
and CPK = 0.72590991268
DEG STAT
1– V A R L I N L O G
[ MODE ] 2
DEG STAT
D A T A 5
[=] [ DATA ] 75 [ DATA ] 85 [ DATA ] 90
[ DATA ] 82 [ DATA ] 77
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