Casio fx-115ES - Manual (Page 52)

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:
1
Σx 2
Sum of squares of the X-data
2
Σx
Sum of the X-data
3
Σy 2
Sum of squares of the Y-data
4
Σy
Sum of the Y-data
5
Σxy
Sum of products of the X-data and Y-data
6
Σx 3
Sum of cubes of the X-data
7
Σx 2 y Sum of (X-data squares
× Y-data)
8
Σx 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:
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 (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