SAS Output

Item Characteristic Curve and Item Information Function: Item14

Plot of iif * skill_level

Distracter analysis table: Item14

The FREQ Procedure

Frequency Col Pct

Table of A14 by Skill_level
A14(A14)	Skill_level							Total
A14(A14)	-2	-1	0	1	2	3	4	Total
A	1 10.00	28 21.54	40 7.49	49 5.38	12 1.39	1 0.22	0 0.00	131
B	6 60.00	36 27.69	101 18.91	91 9.99	31 3.58	5 1.09	0 0.00	270
C	2 20.00	40 30.77	277 51.87	673 73.87	799 92.37	450 98.47	240 100.00	2481
D	1 10.00	26 20.00	116 21.72	98 10.76	23 2.66	1 0.22	0 0.00	265
Total	10	130	534	911	865	457	240	3147
Frequency Missing = 37

Distractor analysis plot: Item14

Plot of prob * Skill_level = A14

Distractor analysis plot: Item14

KEY14
C