Statistics - Applications Projects

Below is a sample item analysis that shows the summary table of statistics for all items (questions) for

Below is a sample item analysis that shows the summary table of statistics for all items (questions) for a pilot assessment of a memory test. The memory test presents a short video depicting a law enforcement scenario and requires candidates to recall relevant details. The test is comprised of 10 multiple choice questions with four options (A-D). For the sample of 10 items, the correct answer is "A". Review the item difficulty (P), discrimination [R(IT)], and the distractors (options B-D).

Prepare a response to address:

What is the difficulty level for each item (i.e., easy, medium, hard)? What is the
overall difficulty level of the test?
Which item(s) could you remove altogether from the exam? Why?
Which distractor(s) would you revise? Why?
Which items are working well? Why?
What next steps in test development would you recommend?

Summary Table of Test Item Statistics: Memory Test N TOTAL = 932 MEAN TOTAL = 69.4 STDEV TOTAL = 10.2 ALPHA = .84
Test Item	P	R(IT)	NC	MC	MI	OMIT	Item Response Option
Test Item	P	R(IT)	NC	MC	MI	OMIT	A	B	C	D
1	0.72	0.34	667	71.56	67.66	1	667	187	37	40
2	0.90	0.21	840	70.11	69.02	1	840	1	81	9
3	0.60	0.39	561	72.66	65.47	0	561	233	46	92
4	0.99	-0.06	923	69.34	69.90	0	923	4	5	0
5	0.94	0.14	876	69.76	68.23	0	876	0	22	34
6	0.77	-0.01	716	69.34	69.57	0	716	16	30	135
7	0.47	0.31	432	72.76	66.16	3	432	207	68	165
8	0.12	0.08	114	71.61	68.39	8	114	318	334	158
9	0.08	0.04	75	70.78	69.03	0	75	604	184	73
10	0.35	0.42	330	75.24	63.54	0	339	108	124	183