Specifications

4. For greater use of the printer
37
Select a standard deviation calculating expressions.
There are two types of calculating expression.
Details of settings
σ
n
........................... When all data in a group is used, and the standard deviation of the group is
obtained.
σ
n-1
........................ Several pieces of sample data in a group are used, and the standard
deviation of the group is estimated from the sample data.
Caution in selection
σ
n-1
calculates the standard deviation only with the sample data extracted from all print data.
Therefore, if it is used when the quantity of data is small, the reliability of the value becomes
low.
Name of settings 17: Standard Deviation
Selection
0. σ
n
(initial value)
1. σ
n-1
* This setting item is necessary when the
GT/ST Print Format setting is 2 - 4.
17: Standard Deviation
σ
n
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Group
All data in the group is used,
and the standard deviation is
obtained.
σ
n
χ
i
χ
–()
2
i1=
n
∑
n
------------------------
=
σ
n-1
○○
○
○
○
○
○
○
○
Group
Only several points of sample
data are used, and the overall
standard deviation is
estimated.
σ
n1–
χ
i
χ
–()
2
i1=
n
∑
n1–
------------------------
=