SAS Output

Item Characteristic Curve and Item Information Function: Item54

Plot of iif * skill_level

Distracter analysis table: Item54

The FREQ Procedure

Frequency Col Pct

Table of A54 by Skill_level
A54(A54)	Skill_level							Total
A54(A54)	-2	-1	0	1	2	3	4	Total
A	3 30.00	28 22.05	166 31.56	507 55.84	661 76.42	407 89.25	233 97.08	2005
B	1 10.00	37 29.13	132 25.10	146 16.08	85 9.83	18 3.95	2 0.83	421
C	4 40.00	29 22.83	123 23.38	148 16.30	62 7.17	14 3.07	2 0.83	382
D	2 20.00	33 25.98	105 19.96	107 11.78	57 6.59	17 3.73	3 1.25	324
Total	10	127	526	908	865	456	240	3132
Frequency Missing = 37

Distractor analysis plot: Item54

Plot of prob * Skill_level = A54

Distractor analysis plot: Item54

KEY54
A