Table 7. Evaluation of interlaboratory vial homogeneity

Sample	Purity of ImpC (%)
	Laboratory 1 (n=6)				Laboratory 2 (n=6)				Laboratory 3 (n=6)
1	99.477				99.477				99.444
2	99.486				99.488				99.452
3	99.486				99.492				99.490
4	99.483				99.493				99.463
5	99.493				99.490				99.491
6	99.484				99.378				99.483
ANOVA single factor
Groups	Count		Sum				Average		Variance
Laboratory 1	6		596.909				99.485		<0.001
Laboratory 2	6		596.818				99.470		0.002
Laboratory 3	6		596.823				99.471		<0.001
ANOVA
Source of variation		SS		df		MS		F		p-value	F crit
Between groups		<0.001		2		<0.001		0.529		0.602	3.682
Within groups		0.012		15		<0.001
Total		0.013		17

ANOVA, analysis of variance; SS, sum of squares; df, degrees of freedom; MS, mean sum of squares.