American Chemical Society
Division of Chemical Education
Composite Norms
High School Chemistry Exam 1997
Score	Percentile	Score	Percentile	Score	Percentile
80	100	53	79	26	14
80	100	52	77	25	12
79	100	51	75	24	10
78	100	50	70	23	8
77	100	50	73	22	7
76	100	49	71	21	5
75	100	48	69	20	3
74	99	47	67	20	4
73	99	46	65	19	3
72	99	45	63	18	2
71	98	44	60	17	1
70	98	43	58	16	1
69	97	42	56	15	1
68	97	41	53	14	0
67	96	40	50	13	0
66	95	39	47	12	0
65	94	38	45	11	0
64	93	37	42	10	0
63	92	36	39	9	0
62	91	35	36	8	0
61	90	34	33	7	0
60	88	33	31	6	0
59	87	32	29	5	0
58	86	31	26	4	0
57	85	30	24	3	0
56	83	29	21	2	0
55	81	28	19	1	0
54	80	27	16
Mean		41.33
Std deviation		13.82
Median		40
KR-21 rel		0.91
Std error/meas		4.22