SAS Output

Item Characteristic Curve and Item Information Function: Item5

Plot of iif * skill_level

Distracter analysis table: Item5

The FREQ Procedure

Frequency Col Pct

Table of A5 by Skill_level
A5(A5)	Skill_level							Total
A5(A5)	-2	-1	0	1	2	3	4	Total
A	3 27.27	54 41.22	334 62.55	669 73.44	734 84.95	420 91.90	239 99.58	2453
B	6 54.55	36 27.48	72 13.48	89 9.77	70 8.10	20 4.38	0 0.00	293
C	0 0.00	22 16.79	55 10.30	43 4.72	9 1.04	0 0.00	0 0.00	129
D	2 18.18	19 14.50	73 13.67	110 12.07	51 5.90	17 3.72	1 0.42	273
Total	11	131	534	911	864	457	240	3148
Frequency Missing = 37

Distractor analysis plot: Item5

Plot of prob * Skill_level = A5

Distractor analysis plot: Item5

KEY5
A