American Chemical Society
Division of Chemical Education
Composite Norms
California Chemistry Diagnostic 1997
Score	Percentile	Score	Percentile	Score	Percentile
44	100	29	85	14	21
43	100	28	83	13	16
42	100	27	81	12	12
41	100	26	78	11	9
40	99	25	74	10	6
39	99	24	71	9	4
38	98	23	66	8	3
37	97	22	61	7	2
36	96	21	56	6	2
35	96	20	51	5	1
34	95	19	45	4	1
33	94	18	40	3	0
32	92	17	36	2	0
31	90	16	31	1	0
30	88	15	26
Mean		20.45
Std deviation		7.56
Median		19.8
KR-21 rel		0.83
Std error/meas		3.14