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Table 2 Descriptive statistics for minutiae count in inside and outside the circle of the right thumbprint

From: Distribution of different minutiae in thumbprint and its application to determine sex distinctions

Minutiae type

Male

Female

Inside circle

Outside circle

z-value

Inside circle

Outside circle

z-value

Mean

S.D.

Mean

S.D.

Mean

S.D.

Mean

S.D.

Bifurcation

7.42

4.16

12.62

6.17

− 4.44**

5.90

3.24

9.68

6.04

− 3.96**

Convergence

8.50

3.89

15.42

6.77

− 5.12**

6.06

3.69

11.52

4.88

− 5.31**

Ridge ending

13.56

6.37

24.40

11.03

− 5.36**

12.80

5.33

26.18

8.80

− 5.69**

Enclosure-small

4.84

2.73

5.20

2.82

− 0.71

2.94

2.12

2.84

2.02

0.20

Enclosure-big

1.76

1.90

3.12

2.42

− 3.18**

1.58

2.12

2.06

2.52

− 1.09

Fragment-small

3.56

3.13

6.98

4.74

− 4.29**

3.14

2.68

5.98

4.25

− 3.84**

Fragment-big

0.68

0.95

1.84

1.75

− 4.10**

1.12

1.53

1.98

1.50

− 3.29**

Crossbar

0.46

0.67

0.46

0.70

0.00

0.50

1.07

0.48

1.05

− 0.16

Overlap

0.70

0.95

1.50

1.26

− 3.77**

0.56

0.81

1.26

1.50

− 2.99**

Break

1.50

1.26

1.18

1.08

− 1.30

1.64

1.91

2.08

2.16

− 1.07

Bridge

1.14

1.12

1.92

1.41

− 2.94**

0.86

1.16

1.20

1.30

− 1.36

Trifurcation bifurcate

0.00

0.00

0.12

0.59

− 1.63

0.08

0.27

0.00

0.00

− 2.00*

Trifurcation convergent

0.04

0.19

0.14

0.49

− 1.27

0.02

0.14

0.00

0.00

− 1.00

M-B

0.00

0.00

0.02

0.14

− 1.00

0.00

0.00

0.00

0.00

0.00

M-C

0.00

0.00

0.14

0.35

− 2.65**

0.02

0.14

0.10

0.58

− 1.00

Point or dot into ridge

1.36

2.09

2.68

3.83

− 3.23**

1.86

2.19

2.46

2.15

− 1.63

Point or dot between ridges

3.44

3.52

4.30

3.02

− 1.80

2.64

3.10

2.58

2.28

− 0.46

Opposited bifurcation

0.30

0.61

0.18

0.38

− 1.27

0.24

0.55

0.08

0.27

− 1.69

Return

1.04

1.00

0.28

0.64

− 3.95**

0.78

0.93

0.40

0.78

− 2.29*

Dock

0.08

0.27

0.06

0.24

− 0.38

0.02

0.14

0.04

0.28

− 0.45

  1. Level of significance p < 0.01**, p < 0.05