American Chemical Society
Division of Chemical Education
Composite Norms
Analytical Chemistry Exam 2007
Score	Percentile	Score	Percentile	Score	Percentile
50	100	33	79	16	3
49	100	32	74	15	2
48	100	31	69	14	2
47	100	30	65	13	1
46	99	29	60	12	1
45	99	28	55	11	1
44	99	27	49	10	1
43	98	26	44	9	0
42	97	25	38	8	0
41	96	24	33	7	0
40	95	23	29	6	0
39	94	22	23	5	0
38	92	21	19	4	0
37	90	20	16	3	0
36	87	19	12	2	0
35	85	18	8	1	0
34	83	17	6
Mean		27.52
Std deviation		7.08
Median		26.7
KR-21 rel		0.77
Std error/meas		3.41