American Chemical Society
Division of Chemical Education
Composite Norms
Instrumental Methods Exam 2009
Score	Percentile	Score	Percentile	Score	Percentile
50	100	30	82	10	1
49	100	29	78	9	0
48	100	28	73	8	0
47	100	27	69	7	0
46	100	26	65	6	0
45	100	25	59	5	0
44	100	24	51	4	0
43	99	23	45	3	0
42	99	22	40	2	0
41	99	21	34	1	0
40	98	20	29
39	97	19	25
38	96	18	19
37	95	17	14
36	95	16	10
35	94	15	6
34	93	14	3
33	91	13	2
32	88	12	2
31	85	11	1
Mean		24.12
Std deviation		6.57
Median		23.3
KR-21 rel		0.73
Std error/meas		3.44