SAS Output

Item Characteristic Curve and Item Information Function: Item35

Plot of iif * skill_level

Distracter analysis table: Item35

The FREQ Procedure

Frequency Col Pct

Table of A35 by Skill_level
A35(A35)	Skill_level								Total
A35(A35)	-3	-2	-1	0	1	2	3	4	Total
A	0 0.00	1 10.00	19 14.73	36 6.84	24 2.64	11 1.27	0 0.00	0 0.00	91
B	1 100.00	5 50.00	38 29.46	42 7.98	27 2.97	14 1.62	3 0.66	1 0.42	131
C	0 0.00	3 30.00	55 42.64	406 77.19	842 92.63	834 96.64	451 98.90	239 99.58	2830
D	0 0.00	1 10.00	17 13.18	42 7.98	16 1.76	4 0.46	2 0.44	0 0.00	82
Total	1	10	129	526	909	863	456	240	3134
Frequency Missing = 37

Distractor analysis plot: Item35

Plot of prob * Skill_level = A35

Distractor analysis plot: Item35

KEY35
C