Citizen SR-270N Instruction Manual page 15

• The values of the statistical variables depend on the data you in-
put. You can recall them by the key operations shown in the below
table. To predict a value for x (or y) given a value for y (or x), enter
^
y
the given value, press [ 2nd ] [ ] (or [ 2nd ] [
again. See Example 42~43.
2
Σ x
[ RCL ] + [ A ]
X
xσ
[ RCL ] + [ B ]
Σ x
n
[ RCL ] + [ C ]
2
Σ y yσ
[ RCL ] + [ D ]
yσ
Σ y
[ RCL ] + [ E ]
Σ xy
[ RCL ] + [ F ]
3
Σ x [ RCL ] + [ M ]
2
Σ x y [ RCL ] + [ X ]
4
Σ x [ RCL ] + [ Y ]
_
^
x x
[ 2nd ] + [ ]
4 2
(Note) : Variable Σ x , Σ x y are only available in Quadratic
regression.
-E14-
^
x
] ), and press [ = ]
σ
xσ
[ 2nd ] + [ ]
n
n
xσ
[ 2nd ] + [ ]
n-1 n-1
_ _
y y
[ 2nd ] + [ ]
yσ
[ 2nd ] + [ ]
n n
yσ
[ 2nd ] + [ ]
n-1 n-1
A [ 2nd ] + [ A ]
B [ 2nd ] + [ B ]
C [ 2nd ] + [ C ]
r [ 2nd ] + [ r ]
^
^
x x
[ 2nd ] + [ ]
^
^
y y
[ 2nd ] + [ ]