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. Author manuscript; available in PMC: 2008 Dec 10.
Published in final edited form as: J Mol Evol. 2008 Sep 9;67(4):368–376. doi: 10.1007/s00239-008-9153-x

Table 3.

A summary of the statistical results for two viral data sets

Phage Obs. Shifta H0: k = 0 (τ̂) HA: k ≠ 0 (, τ̂) Likelihood ratio testb
Approximate methodb
−2logΛ df p df 95% CI
ID11 9 1 0.68 (−1.0, 1.02) 9.42 8 0.006 −1.06 7 (−2.64, −0.57)
2 0.63 (−1.0, 0.89) 9.04 7 0.006 −1.08 6 (−2.93, −0.55)
3 0.50 (−1.0, 0.69) 8.01 6 0.009 −1.00 5 (−3.08, −0.49)
ϕ6 16 1 1.33 (−1.0, 2.03) 17.30 15 <0.001 −1.00 14 (−1.83, −0.63)
2 0.68 (−1.0, 1.33) 8.98 14 0.021 −0.65 13 (−1.22, −0.40)
a

This designates the threshold used for the analysis. 1 indicates the fitness of the lowest fitness mutant; 2, the second lowest; etc. Shifting further than shown results in a failure to reject at the 5% significance level

b

The likelihood ratio test and approximate method are described under Materials and Methods