984 / 1161
1
o
μ
2
o
3
o
2
2
2
2
1
2 1
3 1
3 2
2
2
2
2
2
3 2
2 1
3 1
2
2
2
2
3
3 1
3 2
2 1
(
) / 2
(
) / 2
(
) / 2
−
−
−
−
−
−
−
−
−
= + −
= + −
= + −
σ σ σ σ
σ σ σ σ
σ σ σ σ
Analysis of variance
Observer places O
1,
Observer places O
2
Computer places O
3
Measure distances for many scans and landmarks
Compute standard deviations of differences
Solve for standard deviation of individual observers