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Casio fx-83GT PLUS Manual

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E-21
Statistical Calculations (STAT)
To start a statistical calculation, perform the key operation (STAT)
to enter the STAT Mode and then use the screen that appears to select the
type of calculation you want to perform.
To select this type of statistical calculation:
(Regression formula shown in parentheses)
Press this key:
Single-variable (X)
(1-VAR)
Paired-variable (X, Y), linear regression (
y =A+Bx)
(A+BX)
Paired-variable (X, Y), quadratic regression
(
y =A+Bx +Cx
2
)
( _+CX
2
)
Paired-variable (X, Y), logarithmic regression
( y =A+Blnx)
(ln X)
Paired-variable (X, Y),
e exponential regression
(
y =Ae
B
x
)
(e^X)
Paired-variable (X, Y),
ab exponential regression
(
y =AB
x
)
(A
•B^X)
Paired-variable (X, Y), power regression (y =Ax
B
)
(A
•X^B)
Paired-variable (X, Y), inverse regression
(
y =A+B/x)
(1/X)
Pressing any of the above keys ( to ) displays the Stat Editor.
Note: When you want to change the calculation type after entering the
STAT Mode, perform the key operation (STAT)(Type) to display
the calculation type selection screen.
Inputting Data
Use the Stat Editor to input data. Perform the following key operation to
display the Stat Editor: (STAT)(Data).
The Stat Editor provides 80 rows for data input when there is an X column
only, 40 rows when there are X and FREQ columns or X and Y columns, or
26 rows when there are X, Y, and FREQ columns.
Note: Use the FREQ (frequency) column to input the quantity (frequency) of
identical data items. Display of the FREQ column can be turned on (displayed)
or off (not displayed) using the Stat Format setting on the setup menu.
To select linear regression and input the following data:
(170, 66), (173, 68), (179, 75)
(STAT)(A+BX)
170 173 179 AC
66 68 75
11
STATSTAT
STATSTAT
STATSTAT
… 22 …


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