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6-2 Calculating and Graphing Single-Variable
Statistical Data
Single-variable data is data with only a single variable. If you are calculating the average
height of the members of a class for example, there is only one variable (height).
Single-variable statistics include distribution and sum. The following types of graphs are
available for single-variable statistics.
You can also use the procedures under “Changing Graph Parameters” on page 6-1-2 to make
the settings you want before drawing each graph.
kk
kk
k Normal Probability Plot (NPP)
This plot compares the data accumulated ratio with a normal distribution accumulated ratio.
XList specifies the list where data is input, and Mark Type is used to select from among the
marks { / ! / • }you want to plot.
Press i or !i(QUIT) to return to the statistical data list.
kk
kk
k Histogram (Bar Graph) (Hist)
XList specifies the list where the data is input, while Freq specifies the list where the data
frequency is input. 1 is specified for Freq when frequency is not specified.
6-2-1
Calculating and Graphing Single-Variable Statistical Data
!
w(Draw)
The display screen appears as shown above before the graph is drawn. At this point, you
can change the Start and pitch values.
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