TABLE 1.

Means, standard deviations, and P values associated with a χ² test to compare the distributions of detection times measured by optical densities and estimated from bacterial plate counts in three replicate experiments

Replicate	No. of cells/well	Techniquea	Mean (h)	SD (h)	P value
1	16	OD	39.14	1.435	0.8887
		PC	37.63	0.8191
2	0.70	OD	45.27	1.828	0.4756
		PC	41.69	1.811
3	0.88	OD	44.80	1.155	0.8466
		PC	47.72	2.531

^aOD, optical density measurement; PC, bacterial plate counts.