Casio FX-991ES User Guide - Page 52

Commands when Linear Regression Calculation, A+BX Is Selected - standard deviation in

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Commands when Linear Regression Calculation (A+BX) Is Selected With linear regression, regression is performed in accordance with the following model equation. y = A + BX The following are the commands that appear on the sub-menus that appear when you select 4(Sum), 5(Var), 6(MinMax), or 7(Reg) on the STAT menu while linear regression is selected as the statistical calculation type. See Appendix for information about the calculation formula used for each command. Sum Sub-menu (11(STAT)4(Sum)) Select this menu item: 1Σx2 2Σx 3Σy2 4Σy 5Σxy 6Σx3 7Σx2y 8Σx4 When you want to obtain this: Sum of squares of the X-data Sum of the X-data Sum of squares of the Y-data Sum of the Y-data Sum of products of the X-data and Y-data Sum of cubes of the X-data Sum of (X-data squares × Y-data) Sum of biquadrate of the X-data Var Sub-menu (11(STAT)5(Var)) Select this menu item: When you want to obtain this: 1n 2o 3xσn 4xσn-1 5p 6yσn 7yσn-1 Number of samples Mean of the X-data Population standard deviation of the X-data Sample standard deviation of the X-data Mean of the Y-data Population standard deviation of the Y-data Sample standard deviation of the Y-data MinMax Sub-menu (11(STAT)6(MinMax)) Select this menu item: When you want to obtain this: 1minX Minimum value of the X-data 2maxX Maximum value of the X-data 3minY Minimum value of the Y-data 4maxY Maximum value of the Y-data E-50

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E-50
Commands when Linear Regression Calculation
(A+BX) Is Selected
With linear regression, regression is performed in accordance with
the following model equation.
y
=
A
+
BX
The following are the commands that appear on the sub-menus that
appear when you select
4
(Sum),
5
(Var),
6
(MinMax), or
7
(Reg) on the STAT menu while linear regression is selected as
the statistical calculation type.
See
Appendix
<#060> for information about the calculation
formula used for each command.
Sum Sub-menu (
1
1
(STAT)
4
(Sum))
Select this
When you want to obtain this:
menu item:
1
Σ
x
2
Sum of squares of the X-data
2
Σ
x
Sum of the X-data
3
Σ
y
2
Sum of squares of the Y-data
4
Σ
y
Sum of the Y-data
5
Σ
xy
Sum of products of the X-data and Y-data
6
Σ
x
3
Sum of cubes of the X-data
7
Σ
x
2
y
Sum of (X-data squares
×
Y-data)
8
Σ
x
4
Sum of biquadrate of the X-data
Var Sub-menu (
1
1
(STAT)
5
(Var))
Select this
When you want to obtain this:
menu item:
1
n
Number of samples
2
o
Mean of the X-data
3
x
σ
n
Population standard deviation of the X-data
4
x
σ
n
–1
Sample standard deviation of the X-data
5
p
Mean of the Y-data
6
y
σ
n
Population standard deviation of the Y-data
7
y
σ
n
–1
Sample standard deviation of the Y-data
MinMax Sub-menu (
1
1
(STAT)
6
(MinMax))
Select this
When you want to obtain this:
menu item:
1
minX
Minimum value of the X-data
2
maxX
Maximum value of the X-data
3
minY
Minimum value of the Y-data
4
maxY
Maximum value of the Y-data