SAS Output

Item Characteristic Curve and Item Information Function: Item38

Plot of iif * skill_level

Distracter analysis table: Item38

The FREQ Procedure

Frequency Col Pct

Table of A38 by Skill_level
A38(A38)	Skill_level							Total
A38(A38)	-2	-1	0	1	2	3	4	Total
A	3 30.00	36 27.91	85 16.04	48 5.27	10 1.16	2 0.44	0 0.00	184
B	4 40.00	42 32.56	72 13.58	41 4.50	14 1.62	3 0.66	0 0.00	176
C	1 10.00	31 24.03	314 59.25	800 87.82	836 96.65	451 98.69	240 100.00	2673
D	2 20.00	20 15.50	59 11.13	22 2.41	5 0.58	1 0.22	0 0.00	109
Total	10	129	530	911	865	457	240	3142
Frequency Missing = 37

Distractor analysis plot: Item38

Plot of prob * Skill_level = A38

Distractor analysis plot: Item38

KEY38
C