SAS Output

Item Characteristic Curve and Item Information Function: Item47

Plot of iif * skill_level

Distracter analysis table: Item47

The FREQ Procedure

Frequency Col Pct

Table of A47 by Skill_level
A47(A47)	Skill_level							Total
A47(A47)	-2	-1	0	1	2	3	4	Total
A	7 63.64	60 45.80	191 35.83	164 18.00	47 5.44	1 0.22	0 0.00	470
B	0 0.00	31 23.66	191 35.83	551 60.48	713 82.52	430 94.09	240 100.00	2156
C	3 27.27	29 22.14	122 22.89	161 17.67	79 9.14	21 4.60	0 0.00	415
D	1 9.09	11 8.40	29 5.44	35 3.84	25 2.89	5 1.09	0 0.00	106
Total	11	131	533	911	864	457	240	3147
Frequency Missing = 37

Distractor analysis plot: Item47

Plot of prob * Skill_level = A47

Distractor analysis plot: Item47

KEY47
B