voice category

shape of hard palate

shape of epiglottis

oval

arched

flat

total

high

lower

total

contralto

5

0

2

7

1

6

7

71%

0%

29%

100%

14%

86%

100%

mezzosoprano

3

7

2

12

8

4

12

25%

58%

17%

100%

67%

33%

100%

soprano

2

5

9

16

10

6

16

13%

31%

56%

100%

63%

37%

100%

Pearson Chi-square

13.53

5.68

p-level

0.009

0.058