Casio fx-7400G PLUS, Руководство пользователя, Страница: 132 / 218

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Chapter 7 Statistical Graphs and Calculations
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Displaying Paired-Variable Statistical Results
Paired-variable statistics can be expressed as both graphs and parameter values.
When these graphs are displayed, the menu at the bottom of the screen appears as
below.
[
4
(2VAR) ....... Paired-variable calculation result menu
Pressing
4
(2VAR) displays the following screen.
4
(2VAR)
• Use
c
to scroll the list so you can view the items that run off the bottom of the
screen. The following describes the meaning of each of the parameters.
_
x
...................... Mean of
x
List data
Σ x
.................... Sum of
x
List data
Σ x
2
.................. Sum of squares of
x
List data
x σ
n
.................. Population standard deviation of
x
List data
x σ
n -1
................ Sample standard deviation of
x
List data
n
...................... Number of
x
List data items
_
y
...................... Mean of
y
List data
Σ y
.................... Sum of
y
List data
Σ y
2 .................. Sum of squares of
y
List data
y σ
n
.................. Population standard deviation of
y
List data
y σ
n
-1
................ Sample standard deviation of
y
List data
Σ xy ..................
Sum of the product of data stored in
x
List and
y
List
minX ................ Minimum of
x
List data
maxX............... Maximum of
x
List data
minY ................ Minimum of
y
List data
maxY............... Maximum of
y
List data
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Copying a Regression Graph Formula to the Graph Mode
After you perform a regression calculation, you can copy its formula to the
GRAPH
Mode
.
The following are the functions that are available in the function menu at the bottom
of the display while regression calculation results are on the screen.
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