6-2-1

Calculating and Graphing Single-Variable Statistical Data

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.

kNormal 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 A, J or !J(QUIT) to return to the statistical data list.

kHistogram (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.

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w(Draw)

The display screen appears as shown above before the graph is drawn. At this point, you can change the Start and Width values.

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