Casio Calculator fx-115ES User Manual

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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 (11(STAT)4(Sum))
Select this
When you want to obtain this:
menu item:
1Σx
2
Sum of squares of the X-data
2Σx Sum of the X-data
3Σy
2
Sum of squares of the Y-data
4Σy Sum of the Y-data
5Σxy Sum of products of the X-data and Y-data
6Σx
3
Sum of cubes of the X-data
7Σx
2
y Sum of (X-data squares × Y-data)
8Σx
4
Sum of biquadrate of the X-data
Var Sub-menu (11(STAT)5(Var))
Select this
When you want to obtain this:
menu item:
1n Number of samples
2o Mean of the X-data
3xσn Population standard deviation of the X-data
4xσn–1 Sample standard deviation of the X-data
5p Mean of the Y-data
6yσn Population standard deviation of the Y-data
7yσn–1 Sample standard deviation of the Y-data
MinMax Sub-menu (11(STAT)6(MinMax))
Select this
When you want to obtain this:
menu item:
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

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