Citizen SR-270N Benutzerhandbuch
-E13-
Standard Deviation Calculation
Use the SD mode for standard deviation calculations.
• Always make sure you clear statistical memory by [ 2nd ] [ Scl ]
before preforming standard deviation calculation.
• Individual data can be input using [ DT ] ; To delete data you just
input, please press [ 2nd ] [ CL ]. Multiple data of the same value
can be input using [ 2nd ] [
can be input using [ 2nd ] [
；
]. For example, to input the data 15
seven times, press 15 [ 2nd ] [
；
] 7 [ DT ].
• 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. See Example 41.
table. See Example 41.
[ RCL ] + [ A ]
x
_
[ 2nd ] + [ x
_
]
[ RCL ] + [ B ]
X
σ
n
[ 2nd ] + [ X
σ
n
]
n
[ RCL ] + [ C ]
X
σ
n-1
[ 2nd ] + [ X
σ
n-1
]
Regression Calculation
Use the REG mode for regression calculations.
Press [ MODE ] 3 to enter the REG menu and then choose one of
the six regression types by pressing the corresponding argument
value, as follow :
the six regression types by pressing the corresponding argument
value, as follow :
Lin Log Exp
1 2 3
Pwr Inv Quad
1 2 3
⎯
⎯ ⎯
←
←]
[
⎯
⎯ →
⎯
→]
[
Lin
Linear Regression
y = A + B x
Log
Logarithmic Regression
y = A + B lnx
Exp
Exponential Regression
y = A • e
Bx
Pwr
Power Regression
y = A • x
B
Inv
Inverse Regression
y = A +
Quad
Quadratic Regression
y = A + B x + C x
2
• Always make sure you clear statistical memory by [ 2nd ] [ Scl ]
before preforming regression calculation.
• Individual data can be input using [ DT ] ; To delete data you just
input, please press [ 2nd ] [ CL ]. Multiple data of the same value
can be input using [ 2nd ] [
can be input using [ 2nd ] [
；
]. For example, to input the data 40
and 55 ten times, press 40 [
，
] 55 [ 2nd ] [
；
] 10 [ DT ].