Age

N

Speech Frequency (2007 Edition)

3 kHz

4 kHz (2014 Edition)

6 kHz

n

%

n

%

χ²

P

n

%

χ²

P

n

%

χ²

P

≤40

67

36

53.73

43

64.18

1.511

0.219

47

70.15

3.830

0.050

50

74.63

6.362

0.012

41 - 50

101

72

71.29

59

58.42

3.670

0.055

84

83.17

4.054

0.032

84

83.17

4.054

0.032

χ²-value

5.407

0.561

3.976

1.82

P-value

0.016

0.279

0.036

0.125

3 kHz + 4 kHz

3 kHz + 6 kHz

4 kHz + 6 kHz

3 kHz + 4 kHz + 6 kHz

n

%

χ²

P

n

%

χ²

P

n

%

χ²

P

n

%

χ²

P

45

67.16

2.528

0.112

47

70.15

3.830

0.050

50

74.63

6.362

0.012

45

67.16

2.528

0.112

84

83.17

4.054

0.032

82

81.19

2.733

0.068

84

83.17

4.054

0.032

84

83.17

4.054

0.032

5.788

2.754

1.820

5.788

0.012

0.071

0.125

0.012