Casio fx 991MS User Guide - Page 31

AB AU AU AU AU AU AU AX AX AX AX AX AX AX AX AX AX AX AU AU AU AX AX AX AX - memory recall

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• Always start data input with A B 1(Scl) = to clear statistical memory. • Input data using the key sequence shown below. P S • The values produced by a regression calculation depend on the values input, and results can be recalled using the key operations shown in the table below. To recall this type of value: Perform this key operation: Σx2 Σx n Σy2 Σy Σxy o xσn xσn-1 p yσn yσn-1 Regression coefficient A Regression coefficient B A U 1 A U 2 A U 3 A U r 1 A U r 2 A U r 3 A X 1 A X 2 A X 3 A X r 1 A X r 2 A X r 3 A X r r 1 A X r r 2 Regression calculation other than quadratic regression Correlation coefficient r m n A X r r 3 A X r r r 1 A X r r r 2 • The following table shows the key operations you should use to recall results in the case of quadratic regression. To recall this type of value: Σx3 Σx2y Σx4 Regression coefficient C m1 m2 n Perform this key operation: A U r r 1 A U r r 2 A U r r 3 A X r r 3 A X r r r 1 A X r r r 2 A X r r r 3 29

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29
•
Always start data input with
A
B
1
(Scl)
=
to clear
statistical memory.
•
Input data using the key sequence shown below.
<
x
-data>
P
<
y
-data>
S
•
The values produced by a regression calculation depend
on the values input, and results can be recalled using
the key operations shown in the table below.
To recall this type of value:
Perform this key operation:
Σ
x
2
A
U
1
Σ
x
A
U
2
n
A
U
3
Σ
y
2
A
U
r
1
Σ
y
A
U
r
2
Σ
xy
A
U
r
3
o
A
X
1
x
σ
n
A
X
2
x
σ
n
-1
A
X
3
p
A
X
r
1
y
σ
n
A
X
r
2
y
σ
n
-1
A
X
r
3
Regression coefficient A
A
X
r
r
1
Regression coefficient B
A
X
r
r
2
Regression calculation other than quadratic regression
Correlation coefficient
r
A
X
r
r
3
m
A
X
r
r
r
1
n
A
X
r
r
r
2
•
The following table shows the key operations you should
use to recall results in the case of quadratic regression.
To recall this type of value:
Perform this key operation:
Σ
x
3
A
U
r
r
1
Σ
x
2
y
A
U
r
r
2
Σ
x
4
A
U
r
r
3
Regression coefficient C
A
X
r
r
3
m
1
A
X
r
r
r
1
m
2
A
X
r
r
r
2
n
A
X
r
r
r
3