voice category

reliability of nasal cavity

size of stomatopharynx

good

reduced

total

small

mean

large

total

contralto

2

5

7

0

0

7

7

28.60%

71.40%

100%

0%

0%

100%

100%

mezzosoprano

4

8

12

0

12

0

12

33.30%

66.70%

100%

0%

100%

0%

100%

soprano

13

3

16

16

0

0

16

81%

19%

100%

100%

0%

0%

100%

Pearson Chi-square

8.67

70

p-level

0.013

0