To View Or Change Data; Equation Calculations; To Solve Simultaneous Linear Equations - Citizen SR-270X College Instruction Manual
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For Quadratic Regression (_+CX
C
[7: Reg] [ 3 ]
[7: Reg] [ 4 ]
ˆ x
1
[7: Reg] [ 5 ]
ˆ x
2
[7: Reg] [ 6 ]
y ˆ
You also can add a new data anytime. The unit automatically
recalculates statistics each time you press [ = ] and enter a new data
value.
To view or change data
1. Press [ 2nd ] [ STATVAR ] [ 2 ] to enter Editor Screen.
2. Press [
] or [
3. To change an entry, display it and enter the new data. The new
data you enter overwrites the old entry. Press [ = ] to save the
change.
4. To delete an entry, position the cursor on the line you want to
delete, press [ DEL ].
5. To insert an entry, position the cursor on the line above where
you want to insert, press [ 2nd ] [ STATVAR ] [ 3 ] and then
select [ 1 ] (Ins) to create a new blank entry, fill the new data in
the blank and press [ = ].
6. To delete all entries, press [ 2nd ] [ STATVAR ] [ 3 ] and then
select [ 2 ] (Del-A) to clear all data on the Editor Screen.
(Note) : Statistical data and results are retained when the
calculator is turned off, but are cleared when you change
calculation types, FREQ setting or clear data by
selecting Del-A command from STATVAR menu.
Equation Calculations
Use EQN ( [ MODE ] 3 ( EQN ) ) mode for simultaneous linear
equations calculation.
An equation type menu appears when you press [ MODE ] [3](EQN)
and enter the EQN mode. (See Example 50~51)
EQN Menu
1: anX+bnY=cn
2: anX+bnY+cnZ=dn
To solve simultaneous linear equations
File name : SR100DCollege_English_text_0531_final.doc
version : 10/05/31
2
) only :
Quadratic coefficient C of the regression
coefficients
Estimated value of x1
Estimated value of x2
Estimated value of y
] to scroll through the data you have entered.
Meaning
Simultaneous
linear equations
with two unknowns ⎩
Simultaneous
linear equations
with three
unknowns
E – 18
Equation
⎧
+
=
a
X
b
Y
c
1
1
1
⎨
+
=
a
X
b
Y
c
2
2
2
⎧
+
+
=
a
X
b
Y
c
Z
d
1
1
1
1
⎪
+
+
=
a
X
b
Y
c
Z
d
⎨
2
2
2
⎪
+
+
=
a
X
b
Y
c
Z
d
⎩
3
3
3
3
2
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