voice category

shape of hard palate

shape of epiglottis

oval

arched

flat

total

high

lower

total

basso

13

3

0

16

7

9

16

81.30%

18.80%

0%

100%

48%

56.30%

100%

baritones

5

4

2

11

6

5

11

45.50%

36.40%

18.20%

100.00%

55%

45.50%

100%

tenors

2

1

5

8

6

2

8

25%

13%

63%

100%

70%

25%

100%

Pearson Chi-square

15.15

2.09

p-level

0.004

0.35