Table 2: An example of error distance, frequency of error level, and mean error distance.
Error distance ε (cm)
Frequency of error level
Relative frequency of error level
Product of
e
i
and
p
i
Symbol
e
i
f
i
p
i
=
f
i
/
N
e
i
×
p
i
No error
0
75
0.75
0.0000
Level 1
1.00
20
0.20
0.2000
Level 2
2.25
3
0.03
0.0675
Level 3
4.00
2
0.02
0.0800
Total
N
=100
1.00
0.3475