SAS Output

Item Characteristic Curve and Item Information Function: Item3

Plot of iif * skill_level

Distracter analysis table: Item3

The FREQ Procedure

Frequency Col Pct

Table of A3 by Skill_level
A3(A3)	Skill_level							Total
A3(A3)	-2	-1	0	1	2	3	4	Total
A	3 30.00	10 7.81	18 3.38	13 1.44	12 1.39	4 0.88	1 0.42	61
B	4 40.00	105 82.03	497 93.42	880 97.56	846 98.26	453 99.12	239 99.58	3024
C	1 10.00	10 7.81	11 2.07	9 1.00	2 0.23	0 0.00	0 0.00	33
D	2 20.00	3 2.34	6 1.13	0 0.00	1 0.12	0 0.00	0 0.00	12
Total	10	128	532	902	861	457	240	3130
Frequency Missing = 37

Distractor analysis plot: Item3

Plot of prob * Skill_level = A3

Distractor analysis plot: Item3

KEY3
B