Table 2.

Statistical results of the precision using the data samples of the fixation tests. The number of volunteers is indicated in parenthesis; floating-point values represent angular distances in degrees.

Data Set
Volunteers	A					Volunteers	B
	Valid			All			Valid			All
	$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$		$\mathit{\mu }$	$\mathit{\sigma }$
Normal (8)	0.034	0.011		0.130	0.019	Normal (9)	0.039	0.023		0.236	0.247
Lens (3)	0.027	0.024		0.101	0.013	Lens (2)	0.040	0.006		0.114	0.012
All (11)	0.032	0.014		0.122	0.021	All (11)	0.036	0.016		0.151	0.081