Item

Parameter estimate

Frequency, %

Fit

Expected

Observed

a 1

b 1

a 2

b 2

π 00

π 01

π 11

π 00

π 01

π 11

χ ( 2 ) 2

p-value

19

1.17

−1.09

0.40

−1.26

10.8

27.1

62.1

10.8

27.3

61.9

0.27

0.8730

20

1.57

0.18

1.16

1.27

45.8

31.9

22.3

46.0

30.4

23.5

14.87

0.0006

21

1.86

0.11

0.84

−0.15

28.7

18.4

52.8

28.5

18.7

52.8

0.80

0.6700

22

1.27

−1.43

0.28

−2.61

6.7

26.3

67

6.2

26.8

67.0

5.74

0.0568

35

0.79

−3.74

0.43

3.58

5.1

76.6

18.3

5.1

76.3

18.6

0.46

0.7933

82

1.74

−0.38

1.00

0.00

23

26.9

50.1

21.8

28.0

50.2

12.12

0.0023

83

2.35

0.27

1.02

0.72

43

22.3

34.7

43.9

20.6

35.4

19.15

0.0001

84

2.40

0.61

0.71

2.15

58.1

22.3

19.6

60.5

19.3

20.2

63.90

0.0000

86

2.01

0.00

0.50

−0.43

25.1

19.9

55.1

26.7

18.3

55.0

24.59

0.0000

87

1.99

0.05

0.64

2.25

43.7

35.8

20.5

45.4

33.6

21.0

23.43

0.0000

88

1.63

−0.31

0.86

1.13

32

38.5

29.5

32.8

37.0

30.2

10.13

0.0063

91

2.27

0.31

0.97

0.66

42.4

21.2

36.4

43.8

19.1

37.1

30.13

0.0000

92

2.31

0.16

0.77

2.37

49.7

34.7

15.6

51.2

32.6

16.3

21.48

0.0000

93

2.67

0.28

0.71

1.04

43.4

23.1

33.5

46.3

19.7

34.0

83.34

0.0000

97

1.58

−1.27

0.33

−1.83

7.3

28.2

64.5

6.7

28.8

64.4

6.71

0.0348

98

1.51

−0.39

0.42

−0.95

17.6

22.9

59.5

18.8

21.8

59.4

15.17

0.0005

99

1.94

0.64

0.80

1.03

49.3

18.5

32.2

50.1

17.2

32.8

13.14

0.0014

100

2.15

−0.48

0.43

−3.93

6.8

9.5

83.7

5.8

10.8

83.5

34.05

0.0000

101

1.30

−1.75

0.19

−2.11

5.8

34.5

59.7

5.9

34.4

59.6

0.29

0.8641

103

1.91

0.33

0.57

0.05

32.9

17.7

49.4

34.2

16.4

49.4

16.17

0.0003

104

1.40

−0.70

0.39

1.78

22.6

43.7

33.6

23.3

42.9

33.8

3.97

0.1372

111

0.98

−1.19

0.20

4.67

19.8

51.8

28.4

20.6

50.9

28.5

4.94

0.0848

118

1.90

−0.36

1.06

0.93

31.0

38.9

30.2

30.9

38.0

31.1

5.33

0.0696

119

1.96

0.23

1.14

1.33

48.3

30

21.7

48.4

28.7

22.9

13.76

0.0010

120

1.89

−0.58

0.83

0.43

22.1

35.8

42.1

22.0

35.5

42.5

0.58

0.7474