Table 6. Full maximum likelihood estimates of u × 10³ for several lethalities.

Lethality	u1	u2	u3	u4	u5	u6	$\widehat{\mu }$	Ratio
[99%, 10%)	4.054	0.000	0.000	0.001	0.028	0.850	0.0089	206
[98%, 99%)	24.460	0.337	0.006	0.010	0.067	0.551	0.0289	469
[97%, 98%)	39.577	0.605	0.002	0.002	0.077	0.398	0.0437	620
≥ 98%	28.660	0.272	0.006	0.018	0.089	1.443	0.0380	439
≥ 97%	67.371	1.258	0.021	0.031	0.177	1.954	0.0821	445

Ratio: the ratio of the mutation rate of the first cell division and the mean rate for the interval cell divisions, computed as u1/[(u2 + u3 + 11u4 + 18u5)/32].