Blue : The distance to the center of the right Condyle from the surface of the right skin.

Red : The distance to the center of the left Condyle from the center of the right Condyle.

Yellow : The distance to the center of the left Condyle from the surface of the left skin.

Green : The distance between the left-right skin,.

There is dispersion in red and green. But, there is hardly dispersion in blue and yellow (the distance to the center of Condyle from the surface of the skin).
Therefore, I think that it is possible that it is used as a mean.

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