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Calculating and Graphing Single-Variable Statistical Data
18 - 3
From the statistical data list, press 1 (GRPH) to display the graph menu, press 6
(SET), and then change the graph type of the graph you want to use (GPH1, GPH2,
GPH3) to mean-box graph.
Note :
This function is not usually used in the classrooms in U.S. Please use
Med-box Graph, instead.
P.289
(Graph Type)
(N•Dis) k Normal Distribution Curve
The normal distribution curve is graphed using the following normal distribution function.
y =
1
(2
π
) x
σ
n e
–
( x – x )
2
2 x
σ n
2
The distribution of characteristics of items manufactured according to some fixed standard (such as component length) fall within normal distribution. The more data items there are, the closer the distribution is to normal distribution.
From the statistical data list, press 1 (GRPH) to display the graph menu, press 6
(SET), and then change the graph type of the graph you want to use (GPH1, GPH2,
GPH3) to normal distribution.
P.289
(Graph Type)
(Brkn) k Line Graph
A line graph is formed by plotting the data in one list against the frequency of each data item in another list and connecting the points with straight lines.
Calling up the graph menu from the statistical data list, pressing 6 (SET), changing the settings to drawing of a line graph, and then drawing a graph creates a box graph.
⇒
6 (DRAW)
1 2 3 4 5 6
The display screen appears as shown above before the graph is drawn. At this point, you can change the Start and pitch values.
295
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