# Process Capability - HP 9g - Graphing Calculator User Manual

Graphing calculator.

7.
Press [
] [
variables until you reach the variable you are interested in (see table
below).
Variable
n
or
Xmax or Ymax Maximum of the x values or y values.
Xmin or Ymin
Sx or Sy
σ x or σ y
Σ x or Σ y
Σ x
2
or Σ y
Σ x y
CV x or CV y
R x or R y
8.
To draw 1-VAR statistical graphs, press [ Graph ] on the STATVAR
menu. There are three types of graph in 1-VAR mode: N-DIST (Normal
distribution), HIST (Histogram), SPC (Statistical Process Control). Select
the desired graph type and press [
ranges, the graph will be produced with optimum ranges. To draw a
scatter graph based on 2-VAR datasets, press [ Graph ] on the
9.

## Process Capability

(See Examples 43 and 44.)
1.
Press [ DATA ], select LIMIT from the menu and press [
2.
Enter a lower spec. limit value ( X LSL or Y LSL ), then press [
3.
Enter a upper spec. limit value ( X USL or Y USL), then press [
4.
Select DATA-INPUT mode and enter the datasets.
5.
Press [ 2nd ] [ STATVAR ] and press [
through the statistical results until you find the process capability
variable you are interested in (see table below).
Variable
Cax or Cay
] [
] or [
Meaning
Number of x values or x–y pairs entered.
Mean of the x values or y values.
Minimum of the x values or y values.
Sample standard deviation of the x values or y values.
Population standard deviation of the x values or y
values.
Sum of all x values or y values.
2
Sum of all x
Sum of (x × y) for all x–y pairs.
Coefficient of variation for all x values or y values.
Range of the x values or y values.
Meaning
Capability accuracy of the x values or y values
] to scroll through the statistical
2
values or y
2
values.
]. If you do not set display
] [
E-22
].
].
] [
] [
] to scroll
] .

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