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Estimation of Repeatability by Double Measured Data

Repeatability is estimated by calculating standard deviation using repeated measured data.

But there is the case that we want to know repeatability without such data.
It is the case that repeating is difficult.
In this case
Measured data
is useful.

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Difference between Errors of Samples and Repeatability

For example, there is a data set of 5 samples measured by A and B.
And that of standard deviation.

Standard deviation 2.1 for A and 2.2 for B are sums of errors of samples and repeatability.

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Division of Errors of Samples and Repeatability

Then difference of repeatability A and B is calculated.

(1)

Calculate the difference of A and B.
Then calculate standard deviation of this difference.

Meaning this standard deviation is below.

(2)

At this point we can see the goal.
We can get the value of repeatability using the upper formlations (1) and (2).

NEXT Use Double Measured Data for Pattern Recognition