Table 3.

Variance statistics

Chart	Variance	%Age variance	Mean %age variance	SD
LB 1	0.97	10.42		0.98
LB 2	10.11	42.76		3.18
LB 3	21.40	57.56	27.37	4.63	4.60
LB 4	32.75	57.82		5.72
LB 5	71.63	92.56		8.46
MLB 1	0.14	1.79		0.38
MLB 2	3.53	15.32		1.88
MLB 3	4.32	11.27	6.32	2.08	2.24
MLB 4	9.42	15.16		3.07
MLB 5	14.20	18.51		3.77

SD: standard deviation; LB: Lund and Browder; MLB: modified Lund and Browder.