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Chapter 7 Statistical Graphs and Calculations
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k 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 xList data
Σ
x .................... Sum of xList data
Σ
x
2
.................. Sum of squares of xList data
xσn .................. Population standard deviation of xList data
xσn-1 ................ Sample standard deviation of xList data
n ...................... Number of xList data items
_
y ...................... Mean of yList data
Σ
y .................... Sum of yList data
Σ
y
2
.................. Sum of squares of yList data
yσn .................. Population standard deviation of yList data
yσn-1 ................ Sample standard deviation of yList data
Σ
xy .................. Sum of the product of data stored in xList and yList
minX................ Minimum of
xList data
maxX............... Maximum of
xList data
minY................ Minimum of
yList data
maxY............... Maximum of
yList data
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k 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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