Standard Deviation Calculation; Regression Calculation - Citizen SR-270N Manual De Instrucciones

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 ] [ ]. For example, to input the data 15
；
seven times, press 15 [ 2nd ] [
• 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.
_
x
[ RCL ] + [ A ]
[ RCL ] + [ B ] X
n
[ RCL ] + [ C ]
X

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 :
→]
[
⎯ ⎯ → ⎯
Lin Log Exp
←]
1 2 3 [
← ⎯ ⎯ ⎯
Lin Linear Regression
Log Logarithmic Regression
Exp Exponential Regression
Pwr Power Regression
Inv Inverse Regression
Quad Quadratic Regression
• 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 ] [ ]. For example, to input the data 40
，
and 55 ten times, press 40 [ ] 55 [ 2nd ] [
-E13-
] 7 [ DT ].
_
[ 2nd ] + [ x ]
σ σ
[ 2nd ] + [ X ]
n n
σ σ
[ 2nd ] + [ X ]
n-1 n-1
Pwr Inv Quad
1 2 3
y = A + B x
y = A + B lnx
Bx
y = A • e
B
y = A • x
y = A +
2
y = A + B x + C x
；
] 10 [ DT ].