Citizen SR-281 User Manual page 29

CPK ( [CPK] )
Paired-variable statistics / Regression calculations
Variables
n ( [ n ] )
x ( [2nd]+[ x ] )
y ( [2nd]+[ y ] )
Sx ( [2nd]+[ Sx ] )
Sy ( [2nd]+[ Sy ] )
σ x ( [2nd]+[ σ x ] )
σ y ( [2nd]+[ σ y ] )
x ( [2nd]+[
y ( [2nd]+[
2
x ( [2nd]+[
2
y ( [2nd]+[
x y
CP ( [2nd]+[ CP ] ) Potential capability precision of the x values
CPK ( [ CPK ] )
a ( [2nd]+[ a ] )
b ( [2nd]+[ b ] )
r ( [2nd]+[ r ] )
x ' ([ x ' ] )
y ' ([ y ' ] )
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 )
Meaning
Number of x-y pairs entered
Mean of the x values or y values
Sample standard deviation of x values or y
values
Population standard deviation of x values or
y values
x ] )
Sum of all x values or y values
y ] )
x ])
2
Sum of all x
y ])
2
Sum of ( x • y ) for all x-y pairs
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 )
Regression formula constant term a
Regression formula regression coefficient b
Correlation coefficient r
Estimated value of x
Estimated value of y
2
values or y
-E29-
2
values