American Chemical Society
Division of Chemical Education
Composite Norms
Biochemistry Exam 2007 - in one semester course
Score	Percentile	Score	Percentile	Score	Percentile
60	100	39	80	18	8
59	100	38	77	17	6
58	100	37	74	16	4
57	100	36	71	15	3
56	100	35	68	14	2
55	100	34	65	13	1
54	100	33	62	12	1
53	99	32	58	11	0
52	99	31	55	10	0
51	98	30	51	9	0
50	98	29	48	8	0
49	97	28	43	7	0
48	96	27	40	6	0
47	96	26	36	5	0
46	94	25	32	4	0
45	93	24	28	3	0
44	91	23	24	2	0
43	89	22	20	1	0
42	87	21	16
41	85	20	13
40	83	19	10
	Mean		30.49
	Std deviation		9.34
	Median		29
	KR-21 rel		0.84
	Std error/meas		3.71