Item Characteristic Curve and Item Information Function: Item45

skill_level: 5 p: 0.985 skill_level: 4 p: 0.961 skill_level: 3 p: 0.901 skill_level: 2 p: 0.77 skill_level: 1 p: 0.552 skill_level: 0 p: 0.312 skill_level: 1 iif: 0.247 skill_level: 0 iif: 0.215 skill_level: 2 iif: 0.177 skill_level: -1 p: 0.143 skill_level: -1 iif: 0.123 skill_level: 3 iif: 0.0891 skill_level: -2 iif: 0.0545 skill_level: -2 p: 0.0579 skill_level: -2 p: 0.0579 skill_level: -2 p: 0.0579 skill_level: 4 iif: 0.0373 skill_level: -3 iif: 0.0216 skill_level: -3 p: 0.0221 skill_level: -3 p: 0.0221 skill_level: 5 iif: 0.0144 skill_level: -4 iif: 0.00817596768169 skill_level: -4 p: 0.0082439300646 skill_level: -4 p: 0.0082439300646 skill_level: -4 p: 0.0082439300646 skill_level: -5 iif: 0.0030393651059 skill_level: -5 p: 0.00304865943022 skill_level: -5 p: 0.00304865943022
Plot of iif * skill_level


Distracter analysis table: Item45

The FREQ Procedure

Frequency
Col Pct
Table of A45 by Skill_level
A45(A45) Skill_level Total
-2 -1 0 1 2 3 4
A 1
11.11		 27
21.09		 151
28.54		 185
20.35		 78
9.02		 24
5.26		 4
1.67		 470
 
B 4
44.44		 35
27.34		 47
8.88		 26
2.86		 3
0.35		 2
0.44		 0
0.00		 117
 
C 3
33.33		 35
27.34		 158
29.87		 219
24.09		 110
12.72		 24
5.26		 1
0.42		 550
 
D 1
11.11		 31
24.22		 173
32.70		 479
52.70		 674
77.92		 406
89.04		 235
97.92		 1999
 
Total 9 128 529 909 865 456 240 3136
Frequency Missing = 37


Distractor analysis plot: Item45

Skill_level: 4 prob: 0.979 A45: D Skill_level: 3 prob: 0.89 A45: D Skill_level: 2 prob: 0.779 A45: D Skill_level: 1 prob: 0.527 A45: D Skill_level: -2 prob: 0.444 A45: B Skill_level: -2 prob: 0.333 A45: C Skill_level: 0 prob: 0.327 A45: D Skill_level: 0 prob: 0.299 A45: C Skill_level: 0 prob: 0.285 A45: A Skill_level: -1 prob: 0.273 A45: C Skill_level: -1 prob: 0.273 A45: C Skill_level: -1 prob: 0.273 A45: C Skill_level: -1 prob: 0.273 A45: C Skill_level: -1 prob: 0.273 A45: C Skill_level: -1 prob: 0.273 A45: B Skill_level: -1 prob: 0.242 A45: D Skill_level: 1 prob: 0.241 A45: C Skill_level: -1 prob: 0.211 A45: A Skill_level: 1 prob: 0.204 A45: A Skill_level: 2 prob: 0.127 A45: C Skill_level: -2 prob: 0.111 A45: D Skill_level: -2 prob: 0.111 A45: A Skill_level: 2 prob: 0.0902 A45: A Skill_level: 0 prob: 0.0888 A45: B Skill_level: 3 prob: 0.0526 A45: C Skill_level: 3 prob: 0.0526 A45: A Skill_level: 1 prob: 0.0286 A45: B Skill_level: 4 prob: 0.0167 A45: A Skill_level: 3 prob: 0.00438596491228 A45: B Skill_level: 2 prob: 0.00346820809248 A45: B Skill_level: 4 prob: 0.00416666666666 A45: C Skill_level: 4 prob: 0.00416666666666 A45: C Skill_level: 4 prob: 0.00416666666666 A45: C Skill_level: 4 prob: 0.00416666666666 A45: C
Plot of prob * Skill_level = A45


Distractor analysis plot: Item45

KEY45
D