SAS Output

Item Characteristic Curve and Item Information Function: Item43

Plot of iif * skill_level

Distracter analysis table: Item43

The FREQ Procedure

Frequency Col Pct

Table of A43 by Skill_level
A43(A43)	Skill_level							Total
A43(A43)	-2	-1	0	1	2	3	4	Total
A	2 20.00	33 25.58	69 12.95	46 5.05	21 2.43	6 1.31	2 0.83	179
B	0 0.00	38 29.46	247 46.34	642 70.55	761 88.08	438 95.84	238 99.17	2364
C	6 60.00	40 31.01	168 31.52	171 18.79	61 7.06	11 2.41	0 0.00	457
D	2 20.00	18 13.95	49 9.19	51 5.60	21 2.43	2 0.44	0 0.00	143
Total	10	129	533	910	864	457	240	3143
Frequency Missing = 37

Distractor analysis plot: Item43

Plot of prob * Skill_level = A43

Distractor analysis plot: Item43

KEY43
B