American Chemical Society
Division of Chemical Education
Composite Norms
California Chemistry Diagnostic 1993
Score	Percentile	Score	Percentile	Score	Percentile
44	100	29	90	14	24
43	100	28	89	13	18
42	100	27	86	12	12
41	100	26	84	11	8
40	99	25	81	10	6
39	98	24	77	9	5
38	98	23	73	8	4
37	98	22	70	7	3
36	98	21	64	6	2
35	97	20	57	5	1
34	97	19	51	4	1
33	96	18	45	3	1
32	95	17	39	2	0
31	94	16	35	1	0
30	92	15	30
Mean		19.35
Std deviation		7.01
median		18.8
KR-21 rel		0.8
Std error/meas		3.15