SAS Output

Item Characteristic Curve and Item Information Function: Item36

Plot of iif * skill_level

Distracter analysis table: Item36

The FREQ Procedure

Frequency Col Pct

Table of A36 by Skill_level
A36(A36)	Skill_level							Total
A36(A36)	-2	-1	0	1	2	3	4	Total
A	4 40.00	23 18.25	94 17.64	64 7.03	11 1.27	0 0.00	0 0.00	196
B	1 10.00	37 29.37	49 9.19	16 1.76	2 0.23	0 0.00	1 0.42	106
C	4 40.00	42 33.33	310 58.16	794 87.16	845 97.69	457 100.00	239 99.58	2691
D	1 10.00	24 19.05	80 15.01	37 4.06	7 0.81	0 0.00	0 0.00	149
Total	10	126	533	911	865	457	240	3142
Frequency Missing = 37

Distractor analysis plot: Item36

Plot of prob * Skill_level = A36

Distractor analysis plot: Item36

KEY36
C