SAS Output

Item Characteristic Curve and Item Information Function: Item26

Plot of iif * skill_level

Distracter analysis table: Item26

The FREQ Procedure

Frequency Col Pct

Table of A26 by Skill_level
A26(A26)	Skill_level							Total
A26(A26)	-2	-1	0	1	2	3	4	Total
A	3 27.27	26 20.00	57 10.73	40 4.40	10 1.16	2 0.44	0 0.00	138
B	4 36.36	33 25.38	108 20.34	73 8.03	24 2.77	4 0.88	0 0.00	246
C	1 9.09	44 33.85	310 58.38	766 84.27	825 95.38	450 98.47	240 100.00	2636
D	3 27.27	27 20.77	56 10.55	30 3.30	6 0.69	1 0.22	0 0.00	123
Total	11	130	531	909	865	457	240	3143
Frequency Missing = 37

Distractor analysis plot: Item26

Plot of prob * Skill_level = A26

Distractor analysis plot: Item26

KEY26
C