Casio FX-991ES User Guide - Page 46

Statistical Calculation

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k Absolute Value and Argument (Abs, arg) You can use the following procedure to obtain the absolute value (|Z|) and argument (arg) on the Gaussian plane for a complex number of the format Z = a + bi. 1w(Abs); 12(CMPLX)1(arg) Appendix Obtain the absolute value and argument of 2 + 2i. *1 Absolute Value *2 Argument Statistical Calculation (STAT) All calculations in this section are performed in the STAT Mode (N3). Selecting a Statistical Calculation Type In the STAT Mode, display the statistical calculation type selection screen. k Statistical Calculation Types Key Menu Item 1 1-VAR 2 A+BX 3 _+CX2 4 In X 5 e^X 6 A•B^X 7 A•X^B 8 1/X Statistical Calculation Single-variable Linear regression Quadratic regression Logarithmic regression e exponential regression ab exponential regression Power regression Inverse regression k Inputting Sample Data Displaying the STAT Editor Screen The STAT editor screen appears after you enter the STAT Mode from another mode. Use the STAT menu to select a statistical calculation type. To display the STAT editor screen from another STAT Mode screen, press 11(STAT)2(Data). E-44

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E-44
k
Absolute Value and Argument (Abs, arg)
You can use the following procedure to obtain the absolute value
(|Z|) and argument (arg) on the Gaussian plane for a complex number
of the format Z =
a
+
b
i
.
1w
(Abs);
1
2
(CMPLX)
1
(arg)
Appendix
<#051> Obtain the absolute value and argument of 2 + 2
i
.
*1 Absolute Value
*2 Argument
Statistical Calculation
(STAT)
All calculations in this section are performed in the STAT Mode
(
N
3
).
Selecting a Statistical Calculation Type
In the STAT Mode, display the statistical calculation type selection
screen.
k
Statistical Calculation Types
Key
Menu Item
Statistical Calculation
1
1-VAR
Single-variable
2
A+BX
Linear regression
3
_+CX
2
Quadratic regression
4
In X
Logarithmic regression
5
e
^X
e
exponential regression
6
A•B^X
ab
exponential regression
7
A•X^B
Power regression
8
1/X
Inverse regression
k
Inputting Sample Data
Displaying the STAT Editor Screen
The STAT editor screen appears after you enter the STAT Mode
from another mode. Use the STAT menu to select a statistical
calculation type. To display the STAT editor screen from another STAT
Mode screen, press
1
1
(STAT)
2
(Data).