Table 2 Error of frequency of subjects and range of acceptable error in the X-axis

 Subject 1

1.3

0.6

−1.1

−2.2

0.1

−0.6

0

9.3

3.3

 Subject 2

1.4

2.1

0.2

1.2

4.2

0.8

0.7

0.8

−0.1

 Subject 3

0.2

0.3

1.3

−1.2

4.7

−0.1

8.3

0.6

3.9

 Subject 4

−1.1

0.8

−1.3

−1.6

2.5

−0.3

−0.6

−0.9

−0.9

 Subject 5

−1.1

−1.4

−1

−4.7

4

−1.9

0.6

16

6.2

 Subject 6

0.1

3.4

3.7

0.3

3.7

0.5

3.1

−4.5

−1.7

 Subject 7

−1.8

−0.3

−1.9

0.4

3.2

−0.2

1.9

4.5

1.9

 Subject 8

−0.3

−6

−1.9

−1.5

0.8

−1

2.6

−0.4

1.4

 Subject 9

0.5

1.6

−0.7

−0.8

−0.1

−1.1

0

0.4

0.6

 Subject 10

0.1

−0.9

0.4

−2.5

1.9

−0.2

2.1

4.2

2.1

 Subject 11

−0.5

−0.2

−1.1

−1.5

1.1

0.6

1.7

0.2

1.3

 Subject 12

−0.1

0.6

0.4

0.6

3.6

0.1

0.7

3.5

0.6

 Subject 13

0.1

−0.8

−1.2

−3.5

0.5

−0.6

0.2

−1.9

0.8

 Subject 14

0.5

−1.8

−0.8

−0.5

2

−1.2

−0.2

−2.8

−1.6

Mean

−0.05

−0.14

−0.36

−1.25

2.30

−0.37

1.51

2.07

1.27

Mean (absolute value)

0.65

1.49

1.21

1.61

2.31

0.66

1.62

3.57

1.89

SD

0.89

2.19

1.49

1.64

1.63

0.76

2.26

5.31

2.17

Percent of acceptable error <0.5 mm

64 %

21 %

21 %

21 %

21 %

43 %

29 %

21 %

7 %

28 %

Percent of acceptable error <1 mm

64 %

57 %

36 %

36 %

29 %

71 %

57 %

43 %

36 %

48 %

Percent of acceptable error <2 mm

100 %

78 %

92 %

71 %

57 %

100 %

92 %

50 %

71 %

79 %